Latest Articles from PhytoKeys Latest 67 Articles from PhytoKeys https://phytokeys.pensoft.net/ Fri, 29 Mar 2024 17:38:41 +0200 Pensoft FeedCreator https://phytokeys.pensoft.net/i/logo.jpg Latest Articles from PhytoKeys https://phytokeys.pensoft.net/ Bulbophyllum romklaoense (Orchidaceae), a new species from Thailand https://phytokeys.pensoft.net/article/114999/ PhytoKeys 238: 147-155

DOI: 10.3897/phytokeys.238.114999

Authors: Nicha Thawara, Thitiporn Pingyot, Piyakaset Suksathan, Saroj Ruchisansakun

Abstract: Bulbophyllum romklaoense (B. sect. Lemniscata) from northern Thailand is described and illustrated as a species new to science. It is most similar to B. muscarirubrum and B. triste, but differs by having inflorescences with only 4–6 reddish-brown flowers, falcate-subovate lateral sepals that are connate only in the upper half along the interior margins, petals with erose to fimbriate margins and a lip with long cilia in the distal half on the lower surface. A comparison with other similar species in the section, as well as notes on ecology, phenology, conservation assessment and a key to B. sect. Lemniscata in Thailand are also provided.

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Research Article Tue, 20 Feb 2024 18:03:55 +0200
Phalaenopsis zhanhuoensis (Orchidaceae, Vandeae), a new species from Yunnan, China https://phytokeys.pensoft.net/article/112270/ PhytoKeys 237: 153-160

DOI: 10.3897/phytokeys.237.112270

Authors: Shiyu Qin, Hanchen Wang, Yajun Wang, Chongbo Ma, Zan Li, Boyun Yang, Xiaohua Jin

Abstract: A new species of Orchidaceae, Phalaenopsis zhanhuoensis, from Xichou County, Yunnan, China, is described and illustrated. The novelty is close to P. taenialis, P. wilsonii, and P. stobartiana, but differs from them by having a distinct, fleshy anterior callus with a deeply lobed apex at the base of the labellum and lateral lobes of labellum reflexed and facing outward.

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Research Article Mon, 22 Jan 2024 17:22:31 +0200
Five new and noteworthy species of Epidendroideae (Orchidaceae) from southwestern China based on morphological and phylogenetic evidence https://phytokeys.pensoft.net/article/111230/ PhytoKeys 235: 211-236

DOI: 10.3897/phytokeys.235.111230

Authors: Ji-Dong Ya, Wan-Ting Wang, Yun-Long Liu, Hong Jiang, Zhou-Dong Han, Ting Zhang, Hua Huang, Jie Cai, De-Zhu Li

Abstract: Five new orchid species from southwestern China’s Yunnan Province and the Tibetan Autonomous Region, Neottia lihengiae, Neottia chawalongensis, Papilionanthe motuoensis, Gastrochilus lihengiae, and Gastrochilus bernhardtianus, are described and illustrated. To confirm their identities, and to resolve phylogenetic relationships, we sequenced the complete plastomes of these taxa with their congeneric species, adding new plastomes of three Neottia species, two Papilionanthe species and nine Gastrochilus species. Combined with published plastid sequences, our well-resolved phylogeny supported the alliance of N. lihengiae with the the N. grandiflora + N. pinetorum clade. Neottia chawalongensis is now sister to N. alternifolia, while P. motuoensis is closely related to P. subulata + P. teres. Conversely, phylogenetic analyses based on complete plastomes and plastid sequences showed inconsistent relationships among taxa in the genus Gastrochilus, but the two new species, G. lihengiae and G. bernhardtianus were supported by all datasets.

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Research Article Mon, 20 Nov 2023 17:20:38 +0200
Neottia maolanensis, a replacement name for Neottia bifida M.N.Wang (Orchidaceae) https://phytokeys.pensoft.net/article/113651/ PhytoKeys 235: 81-82

DOI: 10.3897/phytokeys.235.113651

Authors: Mei-Na Wang, Xin-Yi Wu, Cheng-Jiang Tan, Ping Yu, Wen-Hui Rao, Jie-Shan Chen, Jian Li, Jian-Bing Chen

Abstract: According to Articles 53.1 of the International Code of Nomenclature for Algae, Fungi, and Plants (Shenzhen Code), Neottia bifida M.N.Wang (as 'bifidus'; PhytoKeys 229: 222, 2023) is an illegitimate name, and hence a new name Neottia maolanensis M. N. Wang is proposed here.

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Research Article Tue, 14 Nov 2023 17:36:15 +0200
Anoectochilus zhongshanensis (Orchidaceae), a new species from Guangxi, China https://phytokeys.pensoft.net/article/111106/ PhytoKeys 234: 203-218

DOI: 10.3897/phytokeys.234.111106

Authors: Yan-Bin Wu, Yu Han, Xu-Hui He, Hui-Ling Chen, Jin-Zhong Wu, Qi Ye, Cheng-Jian Zheng

Abstract: A new species of Anoectochilus (Orchidaceae) from Guangxi, China, A. zhongshanensis, is described here, which was identified based on phylogenetic studies adopting combined plastid markers (rbcL-matK-trnL-F), morphological observation and chemical analysis. Molecular phylogenetic results support the systematic status of A. zhongshanensis as a new species in Anoectochilus genus. Morphologically, this new species is similar to A. zhejiangensis and A. malipoensis, but differs by its characteristic labellum and column, including the hastate or scalpel-shaped lobes of epichile, forward curved and pinnately divided cristate lobes at both sides of the mesochile and inverted triangle column wings. Furthermore, HPLC-ELSD analysis of these three species revealed the interesting chemotaxonomic difference that the principle and characteristic lactone glycoside in this new species was kinsenoside, rather than its diastereoisomer, goodyeroside A, a major glycoside in A. zhejiangensis and A. malipoensis.

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Research Article Wed, 25 Oct 2023 18:10:34 +0300
Thrixspermum taeniophyllum (Orchidaceae, Epidendroideae), a new species from southwest China, based on molecular and morphological evidence https://phytokeys.pensoft.net/article/104273/ PhytoKeys 230: 145-156

DOI: 10.3897/phytokeys.230.104273

Authors: Jun-Yi Zhang, Yue-Hong Cheng, Min Liao, Gui-Ying Liu, Pan-Yan Yang, Bo Xu, Hai He

Abstract: Thrixspermum taeniophyllum is described as a new orchid species from Wenchuan County, Sichuan Province of southwest China. It is morphologically similar to T. japonicum, but it differs from the latter in having branched stems, slightly fleshy strap-shaped leaves, longer inflorescences with 3–6 flowers and a capitate gynandrium with a lip-shaped mouth opening. Its species status is also supported by molecular phylogenetic analyses, based on nuclear ribosome internal transcribed spacer (nrITS) and three chloroplast DNA fragments (matK, psbA-trnH and trnL-F), which showed distinct systematic boundaries from the most morphologically similar T. japonicum and their morphological relatives T. saruwatarii and T. pygmaeum.

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Research Article Mon, 7 Aug 2023 17:42:52 +0300
Neottia bifidus (Orchidaceae, Epidendroideae, Neottieae), a new mycoheterotrophic species from Guizhou, China https://phytokeys.pensoft.net/article/103107/ PhytoKeys 229: 215-227

DOI: 10.3897/phytokeys.229.103107

Authors: Mei-Na Wang, Xin-Yi Wu, Cheng-Jiang Tan, Ping Yu, Wen-Hui Rao, Jie-Shan Chen, Jian Li, Jian-Bing Chen

Abstract: Neottia bifidus, a new mycoheterotrophic orchid, found in Maolan National Nature Reserve in Guizhou Province, China, is described and illustrated here. The new species is close to N. nidus-avis, N. kiusiana and N. papilligera but differs in having a finely pubescent rachis with fewer flowers, a finely pubescent pedicel, and a fishtail-shaped lip that is deeply bilobed to the middle of the lip, with the lobes diverging at an acute angle (45°) to each other and mesochile with many papillae. Additionally, N. bifidus is well supported as a new species by molecular phylogenetic results based on ITS and chloroplast genome. The chloroplast genome of the novelty, which contains an LSC region of 33,819 bp, SSC region of 5,312 bp and IRs of 46,762 bp was assembled and annotated. A key to mycoheterotrophic Neottia species in China is also provided.

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Research Article Fri, 28 Jul 2023 09:05:52 +0300
Review of Orchidaceae of the northern part of Kazakhstan https://phytokeys.pensoft.net/article/105457/ PhytoKeys 229: 185-213

DOI: 10.3897/phytokeys.229.105457

Authors: Serik A. Kubentayev, Petr G. Efimov, Daniyar T. Alibekov, Andrey N. Kupriyanov, Klara S. Izbastina, Aizhan E. Khalymbetova, Yuri V. Perezhogin

Abstract: We present a review of Orchidaceae Juss. of the northern part of Kazakhstan, within the steppe, forest-steppe and semi-desert habitats of the country (Pavlodar, northern Kazakhstan, Kostanay, Akmola, Aktobe, West Kazakhstan, partially Karaganda and East Kazakhstan regions). The investigation is based on herbarium materials, literature data and field observations. We examined material from the following herbarium collections: LE, MW, TK, MHA, SVER, KUZ, ALTB, AA, NUR, KG, KSPI, NS, NSK, MOSP, ORIS, PPIU, totalling 288 herbarium specimens. The paper presents data in the form of revision, focusing on orchids of the northern part of Kazakhstan. It is accompanied by maps indicating localities, notes on habitat preferences, phenology and conservation status. A total of 25 species of 16 genera were recorded, of which eight are included in the Red Book of Kazakhstan (2014). According to our data, we propose to enlarge the number of protected orchids by adding the following nine species: Corallorhiza trifida, Epipactis atrorubens, Gymnadenia conopsea, Hammarbya paludosa, Herminium monorchis, Liparis loeselii, Malaxis monophyllos, Neottia camtschatea and Spiranthes australis. The most widespread species in the studied region are Dactylorhiza incarnata, D. umbrosa and Epipactis palustris. The rarest species (single locality only) are Epipactis atrorubens, E. helleborine, Epipogium aphyllum, Hammarbya paludosa and Herminium monorchis.

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Research Article Thu, 27 Jul 2023 11:27:45 +0300
Checklist of Orchidaceae from Caquetá, Colombia https://phytokeys.pensoft.net/article/102737/ PhytoKeys 229: 21-46

DOI: 10.3897/phytokeys.229.102737

Authors: Tatiana Arias, Jeisson Chaux-Varela, Maria del Pilar Camero, R. Alexis Calderon-Álvarez, Anyi Carolina Trujillo, Marco A. Correa-Munera, Alejandro Zuluaga, Oscar Perdomo, Oscar A. Pérez-Escobar, Edwin Trujillo-Trujillo, Janice Valencia-D.

Abstract: A checklist of Orchidaceae from Caquetá, Colombia is presented here. We recorded 98 genera and 418 species, exceeding a previous inventory by 276 species. The checklist is conservative in the number of genera and species by including only taxa that were fully and reliably identified and that are either linked to a corresponding herbarium voucher, a living collection specimen or a photo taken in the field and published in iNaturalist by one of the authors or a collaborator. The documented species diversity in the region could dramatically increase in the next few years with additional collecting efforts in the eastern slopes of the Andes nested in Caquetá. About 9% (418/4600) of all Orchidaceae species recorded for Colombia are reported for this area, showing the important contribution to orchid diversity of Andean-Amazonian foothills of Caquetá.

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Checklist Thu, 6 Jul 2023 16:53:18 +0300
A new remarkable Vanilla Mill. (Orchidaceae) species endemic to the Espinhaço Range, Brazil: its phylogenetic position and evolutionary relationships among Neotropical congeners https://phytokeys.pensoft.net/article/101963/ PhytoKeys 227: 151-165

DOI: 10.3897/phytokeys.227.101963

Authors: Emerson Ricardo Pansarin, Euler da Luz Fernandes Menezes

Abstract: During surveys conducted on Neotropical Vanilla, a new endemic species was found in the Brazilian campos rupestres of the Espinhaço Range. Here, this new remarkable Vanilla species, namely V. rupicola Pansarin & E.L.F. Menezes, is described and illustrated. A phylogeny for Vanilla is presented and the relationships between Neotropical species are discussed. The position of V. rupicola among Neotropical Vanilla is discussed within an evolutionary context. Vanilla rupicola is recognized by its rupicolous habit, its reptant stems, and its sessile and rounded leaves. This remarkable new taxon emerges in a clade that includes V. appendiculata Rolfe and V. hartii Rolfe. Vegetative and floral features support a close relationship between V. rupicola and sister taxa, mainly regarding the apical inflorescence (V. appendiculata), the type of appendages of the central crest of the labellum, and the labellar color pattern. Phylogenetic inference suggests that the circumscription of Neotropical Vanilla groups needs revision.

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Research Article Thu, 8 Jun 2023 18:07:28 +0300
New and noteworthy species of the genus Epidendrum (Orchidaceae, Laeliinae) from the Área de Conservación Privada La Pampa del Burro, Amazonas, Peru https://phytokeys.pensoft.net/article/101907/ PhytoKeys 227: 43-87

DOI: 10.3897/phytokeys.227.101907

Authors: Jessy Patricia Arista, Eric Hágsater, Elizabeth Santiago, José D. Edquén, Elí Pariente, Manuel Oliva, Gerardo A. Salazar

Abstract: Fourteen species of the genus Epidendrum, recently collected in the Área de Conservación Privada La Pampa del Burro (ACPPB), five of them new to science (Epidendrum echinatiantherum sp. nov., E. imazaense sp. nov., E. parvireflexilobum sp. nov., E. rosulatum sp. nov., and E. ochrostachyum sp. nov.), are described and illustrated. The other species include a new record for Peru (E. acrobatesii) and four for the department of Amazonas (E. brachyblastum, E. forcipatum, E. mavrodactylon, and E. tridens). Epidendrum enantilobum is here considered a synonym of Epidendrum brachyblastum. The type locality of Epidendrum cryptorhachis, originally stated as Ecuador, Guayabamba, is corrected to indicate that it refers to the valley of Guayabamba, Rodríguez de Mendoza, Amazonas, Peru. Our results show the need to continue conducting botanical exploration in the ACPPB as a baseline for subsequent studies, including a full inventory of the orchid diversity.

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Research Article Thu, 1 Jun 2023 16:12:14 +0300
Independent origins of Spiranthes ×kapnosperia (Orchidaceae) and their nomenclatural implications https://phytokeys.pensoft.net/article/100062/ PhytoKeys 226: 89-100

DOI: 10.3897/phytokeys.226.100062

Authors: Matthew C. Pace

Abstract: Spiranthes Rich. (Orchidaceae) is a commonly encountered but systematically and nomenclaturally challenging component of the North American orchid flora. Here, the evolutionary history and hybrid origin of the recently described S. sheviakii Hough and Young are critically examined. The available molecular data unambiguously support a hybrid origin of S. cernua (L.) Rich. × S. ochroleuca (Rydb.) Rydb. for S. sheviakii, the same parentage as the priority name S. × kapnosperia M.C. Pace. As hybrid formulas can have only one correct name, S. sheviakii is a synonym of S. × kapnosperia. It is likely that S. × kapnosperia evolved independently at least twice in at least two widely disjunct locations.

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Short Communication Fri, 19 May 2023 20:45:56 +0300
A new species of Liparis (Orchidaceae, Epidendroideae, Malaxidinae) from the Bosque de Protección Alto Mayo, San Martín, Peru https://phytokeys.pensoft.net/article/98654/ PhytoKeys 224: 89-99

DOI: 10.3897/phytokeys.224.98654

Authors: José D. Edquén, Jessy P. Arista, Alexander Damián, Gerardo A. Salazar

Abstract: Liparis altomayoënsis sp. nov. is described, illustrated, and tentatively assigned to the Neotropical section Decumbentes on the basis of its branching, prostrate rhizomes and upright stems bearing several leaves. Vegetatively, the new species is distinguished by its short, upward stems bearing 3–6 leaves, these with undulate, translucent margins and reticulate, prominent veining on the upper surface. Florally, it is distinctive in the labellum with fleshy basal one-half provided with a central, rounded cavity limited on each side by a prominent, bilobulate ridge and apically by a lunate ridge, and membranaceous, trilobulate apical one-half deflexed ca. 90°. In contrast with other species of section Decumbentes, in which fruit formation is infrequent, in L. altomayoënsis a high proportion (⁓50–100%) of flowers develop into a fruit; in some flowers the pollinaria rotate and contact the stigma, apparently resulting in at least facultative self-pollination. The main differences among the six species of L. section Decumbentes hitherto known are contrasted in a dichotomous key. The new species is known only from three populations located in the Bosque de Protección Alto Mayo, on the Amazonian slope of the Andes in northeastern Peru but appears to be under no foreseeable threats.

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Research Article Fri, 7 Apr 2023 17:47:17 +0300
Gastrodia bawanglingensis (Orchidaceae, Epidendroideae), a new species from Hainan Island, China https://phytokeys.pensoft.net/article/95137/ PhytoKeys 220: 39-50

DOI: 10.3897/phytokeys.220.95137

Authors: Zhi-Heng Chen, Zhong-Yang Zhang, Xi-Qiang Song, Zhe Zhang

Abstract: Gastrodia bawanglingensis, a new species of Orchidaceae from Hainan Island, China, is described and illustrated. It is morphologically similar to G. theana, G. albidoides and G. albida with dwarf habits, scarcely opening flowers, elongated fruit stems, curved and fleshy perianth tubes and similar columns and lips, but can be easily distinguished from them by having a pair of lateral wings bent outwards at the apex of the column and lateral wings with acuminate tips lower than the anther. According to the IUCN Red List Categories and Criteria, the new species is assessed as Endangered (EN). The plastome of G. bawanglingensis is greatly reduced and reconfigured with approximately 30876 bp in size and 25.36% in GC content. Morphological characteristics and molecular phylogenetic results based on chloroplast gene sequences support the recognition of G. bawanglingensis as a new species within Gastrodia.

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Research Article Thu, 23 Feb 2023 12:09:42 +0200
Liparis tianchiensis (Orchidaceae), a new species from Gansu, China https://phytokeys.pensoft.net/article/90351/ PhytoKeys 219: 27-33

DOI: 10.3897/phytokeys.219.90351

Authors: Xiao-Juan Liu, Xue-Gang Sun

Abstract: Liparis tianchiensis (Orchidaceae, Epidendroideae), a new species from Wenxian County, Gansu Province, China, is described and illustrated, based on morphological characters. Liparis tianchiensis is morphologically similar to L. damingshanensis, L. pauliana and L. mengziensis with erect, lax flowered-inflorescences, small persistent floral bracts, small greenish-purple flowers, spreading sepals, free reflexed and linear petals, a lip with 2 calli near the base and an arcuate column. Liparis tianchiensis differs from L. pauliana by the single and much smaller leaf, shorter sepals and petals, smaller and reflexed oblong lip. It differs from L. mengziensis by having fewer and larger flowers and not connate lip apex. The novelty mostly resembles L. damingshanensis, but can be readily identified by having longer sepals and a reflexed oblong lip. Liparis tianchiensis only occurs in evergreen broad-leaved forest around a mountain lake in Wenxian County, Gansu Province, China.

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Research Article Mon, 23 Jan 2023 18:59:54 +0200
Aphyllorchis periactinantha (Orchidaceae, Neottieae), a new mycoheterotrophic species from peninsular Thailand https://phytokeys.pensoft.net/article/91458/ PhytoKeys 215: 107-115

DOI: 10.3897/phytokeys.215.91458

Authors: Amonrat Chantanaorrapint, Sahut Chantanaorrapint

Abstract: A new orchid species from southern Thailand, Aphyllorchis periactinantha, is described and illustrated. The novelty is characterized by the subactinomophic flowers, the concave labellum, not divided into hypochile and epichile, the reduced staminodes, the shallowly bilobed stigma and the semicircular rostellum. A key to the species of Aphyllorchis in Thailand is updated.

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Research Article Mon, 19 Dec 2022 15:03:28 +0200
Gastrochilus heminii (Orchidaceae, Epidendroideae), a new species from Sichuan, China, based on molecular and morphological data https://phytokeys.pensoft.net/article/91061/ PhytoKeys 215: 95-106

DOI: 10.3897/phytokeys.215.91061

Authors: Min Liao, Yue-Hong Cheng, Jun-Yi Zhang, Yu Feng, Gui-Ying Liu, Ping Ye, Sen-Long Jin, Hong-Qiang Lin, Bo Xu

Abstract: Gastrochilus heminii (Orchidaceae), a new orchid species from Sichuan Province, Southwest China, is described and illustrated. It morphologically resembles G. affinis and G. yei, but differs markedly from the former in having a thinner and slightly rolled downwards reniform epichile and the central thickened purple-red mat with irregular folds (vs. subtriangular epichile curves upwards, with 2 thick, brown to purplish-brown median ridges from base to apex), and can be clearly distinguished from the latter by having reniform epichile with lobed apex and subconical hypochile with bilobed apex that splits into two conical protrusions (vs. semi-rounded epichile not lobed and subconical hypochile not bilobed). The results of molecular phylogenetic analysis based on nuclear ribosome internal transcribed spacer (nrITS) and four chloroplast DNA fragments (matK, psbA-trnH, psbM-trnD, and trnL-F) of 36 Gastrochilus species showed that G. heminii was closely related to G. affinis and G. distichus.

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Research Article Fri, 16 Dec 2022 15:59:59 +0200
Phalaenopsis medogensis (Orchidaceae, Epidendroideae, Vandeae), a new species from Xizang, China https://phytokeys.pensoft.net/article/93607/ PhytoKeys 214: 39-46

DOI: 10.3897/phytokeys.214.93607

Authors: Chong-Bo Ma, Xi-Long Wang, Wen-Shuai Chen, Zhen Liu, Xiao-Hua Jin

Abstract: A new species of Orchidaceae, Phalaenopsis medogensis, from Motuo, Xizang, is described and illustrated based on morphological characters and molecular phylogenetics analysis. Molecular phylogenetic analysis and morphological characters indicate that P. medogensis is close to P. deliciosa, P. gibbosa and P. lobbii, but differs from them by having triangular wings on the column foot, rhombic lip mid-lobe with a fleshy-horned appendage at the base, and concave lip lateral lobes, the lower part white with a deep purplish-red spot and hairy, the upper part pale yellow with dense rust spots.

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Research Article Tue, 22 Nov 2022 18:12:01 +0200
Hemipilia avisoides (Orchidaceae), a new species from Sichuan Province, China https://phytokeys.pensoft.net/article/90377/ PhytoKeys 213: 1-18

DOI: 10.3897/phytokeys.213.90377

Authors: Xue-Man Wang, Ying Tang, Pei-Hao Peng, Hua Peng

Abstract: A new orchid species, Hemipilia avisoides, is described from Songpan County and Maoxian County, Sichuan Province, China. Morphologically, H. avisoides is most similar to H. hui, but can be distinguished by the combination of its involute middle lip lobe that is smaller than the lateral lobes, floral bracts that are 5 mm long and are always shorter than the ovary, a leaf that is appressed to the substrate and is adaxially green with white lines along 7–9 principal veins and the subterranean stem with a solitary sheath at its base. The floral morphology of H. avisoides is presented by utilising in vivo micro-CT scanning and 3D visualisation.

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Research Article Mon, 7 Nov 2022 16:07:53 +0200
Morphological, ecological, and molecular phylogenetic approaches reveal species boundaries and evolutionary history of Goodyera crassifolia (Orchidaceae, Orchidoideae) and its closely related taxa https://phytokeys.pensoft.net/article/91536/ PhytoKeys 212: 111-134

DOI: 10.3897/phytokeys.212.91536

Authors: Kenji Suetsugu, Shun K. Hirota, Narumi Nakato, Yoshihisa Suyama, Shunsuke Serizawa

Abstract: Species delimitation within the genus Goodyera is challenging among closely related species, because of phenotypic plasticity, ecological variation, and hybridization that confound identification methods based solely on morphology. In this study, we investigated the identity of Goodyera crassifolia H.-J.Suh, S.-W.Seo, S.-H.Oh & T.Yukawa, morphologically similar to Goodyera schlechtendaliana Rchb.f. This recently described taxon has long been known in Japan as “Oh-miyama-uzura” or “Gakunan” and considered a natural hybrid of G. schlechtendaliana and G. similis Blume (= G. velutina Maxim. ex Regel). Because the natural hybrid between G. schlechtendaliana and G. similis was described as G. × tamnaensis N.S.Lee, K.S.Lee, S.H.Yeau & C.S.Lee before the description of G. crassifolia, the latter might be a synonym of G. × tamnaensis. Consequently, we investigated species boundaries and evolutionary history of G. crassifolia and its closely related taxa based on multifaceted evidence. Consequently, morphological examination enabled us to distinguish G. crassifolia from other closely related species owing to the following characteristics: coriaceous leaf texture, laxly flowered inflorescence, long pedicellate ovary, large and weakly opened flowers, and column with lateral appendages. Ecological investigation indicates that G. crassifolia (2n = 60) is agamospermous, requiring neither pollinators nor autonomous self-pollination for fruit set, whereas G. schlechtendaliana (2n = 30) is neither autogamous nor agamospermous but is obligately pollinator-dependent. MIG-seq-based phylogenetic analysis provided no evidence of recent hybridization between G. crassifolia and its close congeners. Thus, molecular phylogeny reconstructed from MIG-seq data together with morphological, cytological, and ecological analyses support the separation of G. crassifolia as an independent species.

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Research Article Fri, 4 Nov 2022 18:41:52 +0200
Danxiaorchis mangdangshanensis (Orchidaceae, Epidendroideae), a new species from central Fujian Province based on morphological and genomic data https://phytokeys.pensoft.net/article/91534/ PhytoKeys 212: 37-55

DOI: 10.3897/phytokeys.212.91534

Authors: Miao Zhang, Xiao-Hui Zhang, Chang-Li Ge, Bing-Hua Chen

Abstract: Danxiaorchis mangdangshanensis, a new mycoheterotrophic species from Fujian Province, China, is described and illustrated. The new species is morphologically similar to D. singchiana, but its callus of labellum is a less distinctive Y-shape with three auricles on the apex, four pollinia that are narrowly elliptic in shape and equal in size, and it lacks fine roots. The plastome of D. mangdangshanensis is highly degraded. Phylogenetic analyses distinguished D. mangdangshanensis from its congeners, D. singchiana and D. yangii, with strong support based on nrITS + matK and plastomes, respectively.

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Research Article Fri, 28 Oct 2022 14:25:17 +0300
Liparis macrosepala (Orchidaceae), a new species from southwest China with its phylogenetic position https://phytokeys.pensoft.net/article/87033/ PhytoKeys 210: 67-77

DOI: 10.3897/phytokeys.210.87033

Authors: Zhengwei Wang, Yi Zhang, Ze Zhang, Xiaochen Li, Zhijin Wu, Lan Yan, Aixian Lu, Chengzhi Xie, Chao Hu, Weichang Huang

Abstract: A new orchid species, Liparis macrosepala, is illustrated and described from Yunnan Province, China, based on morphological and molecular analyses. This plant is characterised by the ovoid-fusiform, slightly compressed pseudobulbs with 4 or 5 leaves with slightly crisped margins on their apical half, dorsal sepal heart-shaped, lip with a bituberculate basal callus and a thickened folded lateral lobe on each side, centrally with one cavity with slightly raised margins, the column with a single pair of broadly triangular, obtuse wings. Maximum Likelihood and Bayesian Inference analyses of combined nrITS and plastid matK DNA sequences place this species in section Cestichis.

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Research Article Tue, 4 Oct 2022 15:44:55 +0300
Corrigendum: Kolanowska M, Baranow P, Nowak S, Fuentes A (2021) Materials to the revision of the genus Cranichis (Orchidaceae) in Bolivia. PhytoKeys 186: 11–41. https://doi.org/10.3897/phytokeys.186.71499 https://phytokeys.pensoft.net/article/81571/ PhytoKeys 192: 171-172

DOI: 10.3897/phytokeys.192.81571

Authors: Marta Kolanowska, Przemysław Baranow, Sławomir Nowak, Alfredo Fuentes

Abstract: /

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Corrigenda Mon, 14 Mar 2022 11:34:37 +0200
Maxillaria anacatalinaportillae (Orchidaceae, Maxillariinae), a new remarkable species from Ecuador https://phytokeys.pensoft.net/article/77918/ PhytoKeys 190: 15-33

DOI: 10.3897/phytokeys.190.77918

Authors: Monika M. Lipińska, Natalia Olędrzyńska, Alex Portilla, Dorota Łuszczek, Aidar A. Sumbembayev, Dariusz L. Szlachetko

Abstract: Neotropical genus Maxillaria Ruiz & Pav. belongs to one of the most diverse and species-rich groups of orchids. Several of its representatives are popular, horticultural plants with large and showy flowers, often nicely fragranced. It is not uncommon that some distinctly colored individuals are introduced to the commercial market under names of similar, more or less related species, as informal varieties or color forms, largely causing confusion. While investigating the diversity of Maxillaria in Ecuador, we have encountered plants that were commercially referred to as M. sanderiana xanthina. In the course of conducted morphological and micromorphological analyses, we concluded that it is a new, separate species and hereby, we describe it as M. anacatalinaportillae.

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Research Article Thu, 17 Feb 2022 17:05:24 +0200
Goodyera medogensis (Orchidaceae), a new species from Tibet, China https://phytokeys.pensoft.net/article/77374/ PhytoKeys 189: 141-154

DOI: 10.3897/phytokeys.189.77374

Authors: Yi-Hua Tong, Mei Sun, Bing-Mou Wang, Huai-Zhen Tian

Abstract: A new species of Goodyera (Orchidaceae) from Tibet, China, G. medogensis, is described and illustrated here. Molecular phylogenetic results based on one nuclear (ITS) and two plastid markers (matK and trnL-F) support the recognition of G. medogensis as a new species in Goodyera subsection Reticulum. Morphologically, the novelty is most similar to G. biflora, G. vittata and especially to G. hemsleyana, but differs by the thick grid lines of the reticulations with a diffused margin on the adaxial surface of the leaf blades, the inflorescence with more flowers, the obliquely obovate-rhombic petals, the yellow or yellowish labellum without a lamella on the blade, and the shorter trichomes on the floral bracts, sepals and ovary. Finally, a key to the species of Goodyera subsect. Reticulum in China is also provided.

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Research Article Mon, 14 Feb 2022 18:55:56 +0200
Materials to the revision of the genus Cranichis (Orchidaceae) in Bolivia https://phytokeys.pensoft.net/article/71499/ PhytoKeys 186: 11-41

DOI: 10.3897/phytokeys.186.71499

Authors: Marta Kolanowska, Przemysław Baranow, Sławomir Nowak, Alfredo Fuentes

Abstract: The diversity of Cranichis in Bolivia is evaluated. An updated key for identifying species is provided. Morphological characteristics of 15 species of Bolivian Cranichis are presented together with illustrations of their floral segments. The occurrence of C. diphylla, C. lehmannii, and C. muscosa in this country was not confirmed. In our opinion the previously published Bolivian record for C. polyantha is doubtful. For the first time, C. badia and C. longipetiolata are reported in this country. Two new species of Cranichis are described.

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Research Article Mon, 29 Nov 2021 09:14:23 +0200
A new species of Epidendrum L. (Orchidaceae) of pendulous habit from Peru https://phytokeys.pensoft.net/article/70844/ PhytoKeys 184: 55-66

DOI: 10.3897/phytokeys.184.70844

Authors: Luis Ocupa Horna, Eric Hágsater, Marco M. Jiménez

Abstract: A new species of Epidendrum L. from northern Peru is described, illustrated, and compared with related species. This new species belongs to the Laxicaule Group and shares morphological characteristics with Epidendrum laxicaule D.E. Benn & Christenson but differs in the shape and length of the dorsal sepal; the shape of the petals and the lip, ribs position of the lip, shape of the vesicle formed between the ovary and the column as well as the section of the stem.

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Research Article Wed, 3 Nov 2021 09:40:21 +0200
Corybas papillatus (Orchidaceae), a new orchid species from peninsular Thailand https://phytokeys.pensoft.net/article/71167/ PhytoKeys 183: 1-7

DOI: 10.3897/phytokeys.183.71167

Authors: Janejaree Inuthai, Sahut Chantanaorrapint, Manop Poopath, Naiyana Tetsana, Wittawat Kiewbang, Somran Suddee

Abstract: A new species, Corybas papillatus, is described and illustrated from peninsular Thailand. The new species is easily recognized through a combination of the following characters: the purplish flower, the rounded apex of the dorsal sepal, the outer surface of dorsal sepal covered with irregular papillae in the upper half, the lateral sepals adnate laterally at the base to the connate petals, the V-shaped throat, the labellum bearing short hairs, dentate to erose labellum margins, and well-developed conical spurs. A key to the species of Corybas in Thailand is presented.

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Research Article Fri, 8 Oct 2021 08:00:01 +0300
Lectotypification of six names in the genus Elleanthus (Orchidaceae) described from J. J. Linden’s collection https://phytokeys.pensoft.net/article/68782/ PhytoKeys 182: 93-106

DOI: 10.3897/phytokeys.182.68782

Authors: Magdalena Dudek, Dariusz L. Szlachetko

Abstract: The lectotypification of six names of species, originally described as Evelyna Lind. (Orchidaceae), based on collections of Jean Jules Linden from locations that are currently in Venezuela and Colombia, is proposed. We also provide the number and location of duplicates of the type material.

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Research Article Fri, 24 Sep 2021 14:09:11 +0300
Three new endemic species of Lepanthes (Orchidaceae, Pleurothallidinae) from the highlands of Ecuador https://phytokeys.pensoft.net/article/62671/ PhytoKeys 180: 111-132

DOI: 10.3897/phytokeys.180.62671

Authors: Francisco Tobar Suarez, María Fernanda López, María José Gavilanes, Marco Federico Monteros, Tatiana Santander García, Catherine Helen Graham

Abstract: Three new species of Lepanthes from Ecuador are described and illustrated. These additions to the Ecuadorean flora were recorded in evergreen montane forest and páramo as part of three different research projects conducted during the last five years (2016–2021). Lepanthes oro-lojaensis was discovered in the southwest of El Oro province and is similar to L. jimburae, differing mainly in the much smaller plants, inflorescences and floral parts. Lepanthes microprosartima from the western slopes of Pichincha volcano in northern Ecuador resembles L. obandoi but differs in the coloration of the leaves, the inflorescence that are shorter than the leaves and the smaller floral appendix. Lepanthes caranqui, found in eastern Pichincha and Imbabura, is most similar to L. pachychila but differs from it in its much larger plants and different shape of the petals and the floral appendix. Preliminary assessments of the conservation status of the three taxonomic novelties are provided, using the IUCN Red List Categories and Criteria.

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Research Article Mon, 9 Aug 2021 14:27:17 +0300
Aphyllorchis yachangensis (Orchidaceae), a new holomycotrophic orchid from China https://phytokeys.pensoft.net/article/63994/ PhytoKeys 179: 91-97

DOI: 10.3897/phytokeys.179.63994

Authors: Ying Qin, Hailing Chen, Zhenhai Deng, Yan Liu

Abstract: Aphyllorchis yachangensis, a new holomycotrophic orchid from Guangxi, southern China is described and illustrated here. This new species is similar to A. caudata but differs from the latter mainly by the sepals acute at the apex, the hypochile with 2 smaller and semicircular wings, the epichile adaxially smooth, acute, the lateral lobes triangular-ovate and the column clavate.

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Research Article Mon, 5 Jul 2021 08:57:02 +0300
Taxonomic revision of Habenaria josephi group (sect. Diphyllae s.l.) in the Pan-Himalaya https://phytokeys.pensoft.net/article/59849/ PhytoKeys 175: 109-136

DOI: 10.3897/phytokeys.175.59849

Authors: Tirtha Raj Pandey, Xiao-Hua Jin

Abstract: Species of the Habenaria josephi group in the Pan-Himalaya region are revised, based on their morphological characters and results of previous molecular phylogenetics. Eight distinctive species are recognised; key to the species, taxonomic descriptions, illustrations and distribution maps are provided. Habenaria josephi is re-instated, based on morphological and molecular evidence; H. wolongensis is synonymised with H. aitchisonii, a neotype for H. tibetica and the lectotypes for H. balfouriana, H. fargesii, H. glaucifolia and H. clarkei are designated.

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Research Article Tue, 6 Apr 2021 10:07:33 +0300
A new species and a new record of Liparis sect. Decumbentes (Malaxidinae, Orchidaceae) from Peru https://phytokeys.pensoft.net/article/47229/ PhytoKeys 146: 37-46

DOI: 10.3897/phytokeys.146.47229

Authors: Alexander Damián, Gerardo A. Salazar, Leyda Rimarachín

Abstract: A new species of Liparis sect. Decumbentes, Liparis sessilis Damián, Salazar & Rimarachín, sp. nov is described and illustrated from Amazonas (Perú), including color photographs, a detailed comparison and an identification key to all the species of Liparis sect. Decumbentes. In addition, we report Liparis brachystalix Rchb.f. for the first time for the orchid flora of Peru, and select a lectotype for its synonym, L. commelinoides Schltr.

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Research Article Fri, 8 May 2020 10:10:50 +0300
Calanthe sieboldopsis (Orchidaceae, Epidendroideae, Collabieae), a new species from Luoxiao Mountains, eastern China https://phytokeys.pensoft.net/article/49386/ PhytoKeys 145: 37-45

DOI: 10.3897/phytokeys.145.49386

Authors: Bo-Yun Yang, Huo-Lin Luo, Wei-Chang Huang, Dong-Jin Xiong, Shao-Lin Tan, Bo Li

Abstract: Calanthe sieboldopsis, a new species, is here described and illustrated from Luoxiao Mountains, Jiangxi Province, eastern China. It is morphologically similar to C. sieboldii Decne. ex Regel, but differs from the latter in having smaller flowers, longer spurs, rectangular mid-lobes with emarginate apex (vs. elliptic mid-lobes with mucronate apex), disc with 3 ridges and the proximal ends of the lateral 2 ridges enlarged with light reddish spots and minute white hairs (vs. disc with 5 ridges and 2 rows of white short hairs at base) and pollinia equal in size (vs. unequal in size). A preliminary risk-of-extinction assessment, according to the IUCN Red List Categories and Criteria, is given for the new species.

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Research Article Fri, 10 Apr 2020 10:10:12 +0300
Molecular phylogenetic study of the tribe Tropidieae (Orchidaceae, Epidendroideae) with taxonomic and evolutionary implications https://phytokeys.pensoft.net/article/46842/ PhytoKeys 140: 11-22

DOI: 10.3897/phytokeys.140.46842

Authors: Izai A. B. Sabino Kikuchi, Paul J. A. Keβler, André Schuiteman, Jin Murata, Tetsuo Ohi-Toma, Tomohisa Yukawa, Hirokazu Tsukaya

Abstract: The orchid tribe Tropidieae comprises three genera, Tropidia, Corymborkis and Kalimantanorchis. There are three fully mycoheterotrophic species within Tropidieae: Tropidia saprophytica, T. connata and Kalimantanorchis nagamasui. A previous phylogenetic study of K. nagamasui, based only on plastid matK data, placed K. nagamasui outside the clade of Tropidia and Corymborkis without support. In this study, we performed phylogenetic analyses using a nuclear ribosomal DNA spacer (ITS1-5.8S-ITS2), a low-copy nuclear coding gene (Xdh) and a mitochondrial intron (nad1b-c intron) to study the phylogenetic relationships within Tropidieae. We included six photosynthetic and all three fully mycoheterotrophic Tropidieae species. The resulting phylogenetic trees placed these fully mycoheterotrophic species inside the Tropidia clade with high support. In our trees, these three species do not form a monophyletic group together, because the photosynthetic T. graminea is nested amongst them. Our results also suggest that the loss of photosynthetic ability occurred at least twice in Tropidia.

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Research Article Wed, 19 Feb 2020 10:11:49 +0200
Dilochia deleoniae (Orchidaceae), a new species from Mindanao, Philippines https://phytokeys.pensoft.net/article/46935/ PhytoKeys 139: 91-97

DOI: 10.3897/phytokeys.139.46935

Authors: Danilo N. Tandang, John Michael M. Galindon, Edwin R. Tadiosa, Fulgent P. Coritico, Victor B. Amoroso, Noel E. Lagunday, Rene Alfred Anton Bustamante, Darin S. Penneys, Peter W. Fritsch

Abstract: A new species, Dilochia deleoniae Tandang & Galindon (Orchidaceae), from Mindanao Island, Philippines is described and illustrated herein. This species is distinct from other known Philippine Dilochia species by its terrestrial habit and is distinguished from all known Dilochia species by its monopodial inflorescence, rarely branching in two, and a pale yellow to dull orange or brownish-yellow labellum devoid of purple spots.

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Research Article Tue, 4 Feb 2020 11:39:27 +0200
Bulbophyllum papuaense (Orchidaceae), a new species from Indonesia https://phytokeys.pensoft.net/article/38714/ PhytoKeys 138: 125-130

DOI: 10.3897/phytokeys.138.38714

Authors: Dongliang Lin, Kailing Zhou, Arief Hidayat, Xiao-Hua Jin

Abstract: A new species, Bulbophyllum papuaense, was described and illustrated from Indonesia. Bulbophyllum papuaense is similar to Bulbophyllum tortuosum and B. muscohaerens but differs from them by having rhizome and pseudobulbs covered with papillose scales, caudate and ciliate petals, linear and ciliate lip.

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Research Article Fri, 10 Jan 2020 14:29:08 +0200
Notes on the genus Gastrochilus (Orchidaceae) in Myanmar https://phytokeys.pensoft.net/article/38781/ PhytoKeys 138: 113-123

DOI: 10.3897/phytokeys.138.38781

Authors: Qiang Liu, Shi-Shun Zhou, Ren Li, Yun-Hong Tan, Myint Zyaw, Xiao-Ke Xing, Jiang-Yun Gao

Abstract: Myanmar is known for its high species richness of genus Gastrochilus; however, most of them lack proper information for taxonomic revision. During four years of field investigation in Myanmar, two new distributional records were encountered, namely, G. arunachalensis and G. corymbosus and one species, i.e. G. pechei was rediscovered after its original description. The three species were not easy to interpret from the available original descriptions and types due to severely shrunk or poorly preserved specimens. Therefore, we hereby present more detailed illustrations and updated descriptions for these species, based on freshly collected materials.

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Research Article Fri, 10 Jan 2020 14:29:07 +0200
An annotated checklist of Myanmar orchid flora https://phytokeys.pensoft.net/article/36144/ PhytoKeys 138: 49-112

DOI: 10.3897/phytokeys.138.36144

Authors: Ye Lwin Aung, Aye Thin Mu, Mung Htoi Aung, Qiang Liu, Xiao-Hua Jin

Abstract: Myanmar is situated in Southeast Asia, where species richness and diversity are very high. Myanmar orchid flora is very rich, but still poorly known because botanical explorations have sharply decreased in Myanmar since 1950. The present study provides a checklist of Myanmar orchid flora which includes 1040 species and 151 genera currently known from Myanmar, based on the herbarium specimens, literature and online databases. The number of species is increased by approximately 200 species more than that given in the checklist of Kress et al. (2003), mainly due to recent discoveries of new species to science and new records for Myanmar. There are 76 endemic species of Orchidaceae in Myanmar. It is estimated that ca. 150–300 species still remain as unidentified and are expected to be discovered in further studies on Myanmar orchid flora.

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Checklist Fri, 10 Jan 2020 14:29:06 +0200
The taxonomic identities of Pholidota wenshanica and P. subcalceata (Orchidaceae, Coelogyninae) https://phytokeys.pensoft.net/article/46705/ PhytoKeys 136: 97-106

DOI: 10.3897/phytokeys.136.46705

Authors: Lin Li, Ming Qin, Wan-Yao Wang, Song-Jun Zeng, Guo-Qiang Zhang, Zhong-Jian Liu

Abstract: P. wenshanica S.C.Chen & Z.H.Tsi and P. subcalceata Gagnep. have long been recognized as synonyms of P. leveilleana Schltr. In the present study, detailed morphological comparisons suggest that specimens referred to as P. wenshanica and P. subcalceata differ significantly in both vegetative and floral characters from those of P. leveilleana. Here we resurrect P. wenshanica and P. subcalceata as independent species. Key diagnostic characters essential for delineating identities of these species are presented.

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Research Article Thu, 19 Dec 2019 10:49:53 +0200
The first report of Nervilia lilacea Jum. & H. Perrier (Orchidaceae, Epidendroideae) from Kenya and the Northern Hemisphere https://phytokeys.pensoft.net/article/46629/ PhytoKeys 135: 35-38

DOI: 10.3897/phytokeys.135.46629

Authors: Jing Tian, Vivian Kathambi, Peris Kamau, Geoffrey Mwachala, Itambo Malombe, Guang-Wan Hu

Abstract: Nervilia lilacea is recorded from Kenya as well as the Northern Hemisphere for the first time. A plate of ink drawing and a distribution map are provided based on the new collection.

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Short Communication Mon, 11 Nov 2019 10:17:07 +0200
Validation of Gastrochilus prionophyllus (Vandeae, Orchidaceae), a new species from Yunnan Province, China https://phytokeys.pensoft.net/article/34555/ PhytoKeys 130: 161-169

DOI: 10.3897/phytokeys.130.34555

Authors: Xun-Feng Wu, De-Ping Ye, Bo Pan, Xiang-Qun Lin, Hong Jiang, Qiang Liu

Abstract: Gastrochilus prionophyllus, which was previously not validly published, is here validated. The species is described along with illustration and photos. Morphologically, the long and pendulous stem and distichous leaves of this new species indicate that it belongs to the sect. Microphyllae. It is unique in having thick fleshy leaves and margin significantly serrate, small flowers, reniform epichile and margin with dentations, thickened cushion on the central epichile and subconic hypochile. Meanwhile, a preliminary conservation status assessment according to IUCN Red List categories and criteria is given to the new species.

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Research Article Thu, 29 Aug 2019 10:59:15 +0300
Two new species of Cylindrolobus (Orchidaceae) from the eastern Himalayas https://phytokeys.pensoft.net/article/33989/ PhytoKeys 130: 107-113

DOI: 10.3897/phytokeys.130.33989

Authors: Ji-Dong Ya, Xiao-Hua Jin, Cheng Liu

Abstract: Two new species, Cylindrolobus motuoensis and C. glabriflorus (Orchidaceae), from Southwestern China and north of Myanmar are described and illustrated with detailed photos. Cylindrolobus motuoensis is morphologically similar to C. gloensis and C. foetidus, but can be distinguished from them by having amplexicaul sterile bracts, dark red floral bracts, white flowers, falcate-lanceolate lateral sepals and central keel of lip running from base to the tip of mid-lobe. Cylindrolobus glabriflorus is similar to C. hegdei and C. tenuicaulis but differs from them by having longer and wider leaves, obovate bracts, and the reddish brown central papillate keel of lip.

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Research Article Thu, 29 Aug 2019 10:59:10 +0300
Bulbophyllum reflexipetalum (Orchidaceae, Epidendroideae, Malaxideae), a new species from Xizang, China https://phytokeys.pensoft.net/article/34153/ PhytoKeys 130: 33-39

DOI: 10.3897/phytokeys.130.34153

Authors: Ji-Dong Ya, Yong-Jie Guo, Cheng Liu, Jie Cai, Gui-Jun Dong, Hong Jiang, De-Zhu Li

Abstract: Bulbophyllum reflexipetalum, a new species from Motuo County, Southeast Xizang, China, is described and illustrated here. This new species belongs to Bulbophyllum sect. Umbellata Bentham & J. D. Hooker, and it is morphologically similar to B. umbellatum Lindley, B. guttulatum (J. D. Hooker) N. P. Balakrishnan and B. salweenensis X.H. Jin, but is distinguished from them by having reflexed petals, base of dorsal sepal with 1 dentate on each side, lip with significantly revolute margin, adaxially with dark brown spots or patches and one longitudinal groove.

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Research Article Thu, 29 Aug 2019 10:59:03 +0300
An annotated checklist of vascular plants of Cherangani hills, Western Kenya https://phytokeys.pensoft.net/article/30274/ PhytoKeys 120: 1-90

DOI: 10.3897/phytokeys.120.30274

Authors: Yuvenalis Morara Mbuni, Yadong Zhou, Shengwei Wang, Veronicah Mutele Ngumbau, Paul Mutuku Musili, Fredrick Munyao Mutie, Brian Njoroge, Paul Muigai Kirika, Geoffrey Mwachala, Kathambi Vivian, Peninah Cheptoo Rono, Guangwan Hu, Qingfeng Wang

Abstract: Cherangani hills, located in Western Kenya, comprises of 12 forest blocks, maintaining great plant diversity. However, little attention to plant diversity studies has been paid to it in the past years. Here, we present a checklist of the vascular plants of this region obtained through intensive field investigations and matching of herbarium specimens. In total, 1296 species, including 17 endemic species are documented, belonging to 130 families and 608 genera. This flora represents 18.50%, 43.83% and 54.17% of the Kenyan species, genera and families, respectively. The habit, habitat and voucher specimens, as well as brief notes on the distribution of each taxon recorded are presented in this checklist. It is the first exhaustive inventory of the terrestrial vascular plants in Cherangani hills which is a significant regional centre for plant diversity.

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Checklist Thu, 18 Apr 2019 11:40:46 +0300
Liparis napoensis (Orchidaceae), a new species from Guangxi, China https://phytokeys.pensoft.net/article/32041/ PhytoKeys 119: 31-37

DOI: 10.3897/phytokeys.119.32041

Authors: Lin Li, Shih-Wen Chung, Bo Li, Song-Jun Zeng, Hai-Fei Yan, Shi-Jin Li

Abstract: Liparis napoensis, a new orchid species belonging to section Cestichis from Guangxi, China is described and illustrated. It occurs in the karst limestone forest. The new species is morphologically similar to L. viridiflora and L. somae, but can be readily distinguished by having narrowly oblong-falcate petals; flabellate-quadrate lip distinctly concave at base and emarginate at apex; conspicuously arcuate column with a pair of wedge-shaped wings.

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Research Article Fri, 15 Mar 2019 11:41:33 +0200
The Reserva de la Biosfera Barranca de Metztitlán (Hidalgo): An illustrated checklist of bromeliads and orchids and their high levels of Mexican endemisms https://phytokeys.pensoft.net/article/31603/ PhytoKeys 118: 105-123

DOI: 10.3897/phytokeys.118.31603

Authors: Claudia T. Hornung-Leoni, Yesenia J. Chavarria-Olmedo, Ivón M. Ramírez-Morillo

Abstract: This study presents a list of species of the two most important families with epiphytic elements, Bromeliaceae and Orchidaceae, from the Reserva de la Biosfera Barranca de Metztitlán (RBBM), the largest Reserve in Hidalgo, Mexico. Thirty-four species are included, 26 corresponding to species in three genera of bromeliads, and eight species in six genera of orchids. The new records represent 26.5% of the total listed in the area; nine of them are new records for the Reserve (RBBM) and one is new for Hidalgo State. This study reveals that endemism for both families is very important in the Reserve (55.88%), since it includes 13 Mexican bromeliads, of which two are endemic to Hidalgo and one to the Reserve, and three orchids, two endemic to Mexico and one to the Reserve. We found species with different types of relative abundance: rare (16) and occasional (7). Additionally, we include information about the category (IUCN, CITES, NOM-059-SEMARNAT) as well as uses reported in the literature for the species in the RBBM. The checklist is strictly based on information obtained from deposited herbarium specimens as well as from those collected during fieldwork. We suggest that a conservation plan (in situ and ex situ) for the RBBM is important and necessary. The predominant habit for both families is epiphytic (17 species); even though there are terrestrial (7) and saxicolous (2), and the remaining are facultative species (8). Nine species are included in some risk category. The present work is the most complete and updated list of Bromeliaceae and Orchidaceae for this important natural area in the Mexican State of Hidalgo. However, more fieldwork is needed to document the biodiversity of the area in general and its flora in particular, as a way to highlight the importance of protected areas in preserving biodiversity.

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Checklist Tue, 12 Mar 2019 13:10:31 +0200
Bulbophyllum chrysolabium (Orchidaceae, Epidendroideae, Malaxideae), a new species from Yunnan, China https://phytokeys.pensoft.net/article/28136/ PhytoKeys 111: 61-68

DOI: 10.3897/phytokeys.111.28136

Authors: Lin Li, De-Ping Ye, Song-Jun Zeng

Abstract: Bulbophyllum chrysolabium, a new species belonging to section Racemosae from Yunnan, China is described and illustrated. The species is related to B. orientale and B. morphologorum, but differs by having the following set of characters: obliquely broadly-based triangular petals with a long filiform apex; lip densely glandular papillose and conspicuously ciliolate along margins; lip auricles well developed, narrowly falcate, tapering to a long sharp point at the apex; stelidia subulate and twisted inwards, slightly exceeding operculum. The conservation status of B. chrysolabium is assessed and taxonomic notes are provided.

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Research Article Tue, 13 Nov 2018 13:14:31 +0200
A Linnaeus NG interactive key to the species of Glomera (Orchidaceae, Coelogyninae) from Southeast Asia https://phytokeys.pensoft.net/article/28435/ PhytoKeys 110: 9-22

DOI: 10.3897/phytokeys.110.28435

Authors: Richa Kusuma Wati, Rogier R. van Vugt, Barbara Gravendeel

Abstract: We present a multilingual interactive key available online (http://glomera.linnaeus.naturalis.nl) that can be used on any web browser without the need for installing additional software. The key includes 169 species of Glomera, a genus within the necklace orchids (Coelogyninae) not yet comprehensively treated in any recent field guide or web-based survey. With this key, plants can be identified using a combination of vegetative and floristic characters in addition to distribution and ecology as a first step to further taxonomic revisions. We urge anyone with an interest in wild orchids in Southeast Asia to contribute new observations to update current information on the distribution of these overlooked plants as a first step for a taxonomic revision and to gain more insight into their conservation status.

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Research Article Fri, 26 Oct 2018 10:14:17 +0300
Odontochilus putaoensis (Cranichideae, Orchidaceae), a new species from Myanmar https://phytokeys.pensoft.net/article/25913/ PhytoKeys 103: 19-26

DOI: 10.3897/phytokeys.103.25913

Authors: Ye Lwin Aung, Aye Thin Mu, Xiaohua Jin

Abstract: Odontochilus putaoensis, a new species of Orchidaceae, is described and illustrated from Putao Township, Kachin State, Myanmar. Odontochilus putaoensis is close to O. duplex, but can be easily distinguished from the latter by having a light yellow lip, a bisaccate hypochile with a small, erect, blade-like and emarginate callus within each sac, a mesochile with a pair of dentate-pectinate flanges and a bilobed epichile with a pair of widely diverging lobes that are erect and concave. An identification key to the Southeast Asian species of Odontochilus and colour photographs of O. putaoensis are provided. A preliminary conservation assessment according to the IUCN Red List Categories and Criteria is given for the new species.

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Research Article Mon, 2 Jul 2018 12:07:16 +0300
Coelogyne victoria-reginae (Orchidaceae, Epidendroideae, Arethuseae), a new species from Chin State, Myanmar https://phytokeys.pensoft.net/article/23298/ PhytoKeys 98: 125-133

DOI: 10.3897/phytokeys.98.23298

Authors: Shi-Shun Zhou, Yun-Hong Tan, Xiao-Hua Jin, Kyaw Win Maung, Myint Zyaw, Ren Li, Rui-Chang Quan, Qiang Liu

Abstract: Coelogyne victoria-reginae, a new species of section Proliferae, from Natma Taung (Mt.Victoria) National Park, Chin State, Myanmar, is described and illustrated. It is morphologically similar to C. prolifera, but the clustered pseudobulbs, pure brownish- red flowers and column wing with irregular notches at the apex of the new species differ from the other species. A preliminary risk-of-extinction assessment shows that the new species is regarded as EN C2a[i] according to the IUCN Red List Categories and Criteria.

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Research Article Fri, 18 May 2018 10:56:02 +0300
New taxonomic and conservation status of Ossiculum (Vandeae, Orchidaceae), a highly threatened and narrow-endemic angraecoid orchid from Central Africa https://phytokeys.pensoft.net/article/23511/ PhytoKeys 98: 85-97

DOI: 10.3897/phytokeys.98.23511

Authors: Murielle Simo-Droissart, Tariq Stévart, Bonaventure Sonké, Sandrine Mayogo, Narcisse Kamdem, Vincent Droissart

Abstract: In the context of producing a revised phylogenetic Linnean taxonomy of angraecoid orchids, the monotypic and narrow-endemic genus Ossiculum is synonymised with Calyptrochilum. Accordingly, a new combination in Calyptrochilum is proposed for Ossiculum aurantiacum. The morphological and DNA-based evidence for this transfer is discussed. Moreover, Calyptrochilum aurantiacum is here firstly reported outside Cameroon, with a record from the Republic of the Congo. The Red List conservation status of this species is reassessed and it is to be downgraded from “Critically Endangered” (CR) to “Endangered” (EN), following the recent discovery of additional subpopulations in Cameroon.

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Research Article Wed, 2 May 2018 11:50:46 +0300
Afropectinariella (Vandeae, Orchidaceae), a new genus of the Angraecum alliance https://phytokeys.pensoft.net/article/23933/ PhytoKeys 96: 79-86

DOI: 10.3897/phytokeys.96.23933

Authors: Murielle Simo-Droissart, Bonaventure Sonké, Vincent Droissart, Tariq Stévart

Abstract: A recent phylogenetic study showed that species assigned to the newly recognised genus Pectinariella Szlach., Mytnik & Grochocka (previously treated as Angraecum Bory sect. Pectinaria Benth.) are polyphyletic, comprising a clade with species primarily in Madagascar and the Western Indian Ocean islands (including the type) and another non-sister clade whose members occur in continental Africa and the Gulf of Guinea islands. In order to render Pectinariella monophyletic, the five continental African species must therefore be removed. A new genus, Afropectinariella M.Simo & Stévart, is described and the following combinations are made: Afropectinariella atlantica (Stévart & Droissart) M.Simo & Stévart, Afropectinariella doratophylla (Summerh.) M.Simo & Stévart, Afropectinariella gabonensis (Summerh.) M.Simo & Stévart, Afropectinariella pungens (Schltr.) M.Simo & Stévart and Afropectinariella subulata (Lindl.) M.Simo & Stévart.

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Short Communication Fri, 13 Apr 2018 15:45:42 +0300
Dendrobium naungmungense (Orchidaceae, Dendrobieae), a new species from Kachin State, Myanmar https://phytokeys.pensoft.net/article/21337/ PhytoKeys 94: 31-38

DOI: 10.3897/phytokeys.94.21337

Authors: Qiang Liu, Shi-Shun Zhou, Xiao-Hua Jin, Bo Pan, Kyaw Win Maung, Myint Zyaw, Ren Li, Rui-Chang Quan, Yun-Hong Tan

Abstract: Dendrobium naungmungense, a new species from Naungmung, Kachin State, North Myanmar, is described and illustrated. It is morphologically similar to D. ciliatilabellum and D. vexabile, but the epichile is oblong with three long-ciliate laminae and the column wing has significant denticulation. A preliminary risk-of-extinction assessment shows that the new species should be regarded as Critically Endangered (CR) according to the IUCN Red List Categories and Criteria.

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Research Article Mon, 29 Jan 2018 14:56:32 +0200
Molecular systematics and the evolution of mycoheterotrophy of tribe Neottieae (Orchidaceae, Epidendroideae) https://phytokeys.pensoft.net/article/21346/ PhytoKeys 94: 39-49

DOI: 10.3897/phytokeys.94.21346

Authors: Ting Zhou, Xiao-hua Jin

Abstract: Neottieae comprise about 150–200 species and are distributed mainly in temperate and subtropical zones of the northern hemisphere. Mycoheterotrophy is common in Neottieae. Based on three DNA markers and a broad sampling of Neottieae, these results indicate that Neottieae is strongly supported as monophyletic and Palmorchis is sister to the remaining genera of Neottieae. Holopogon and Neottia s.s. are deeply nested within Listera. The habit of leafless mycotrophy has independently evolved at least three times in Neottieae, one in Cephalanthera, another in Neottia s.l. and the third in the clade formed by Limodorum and Aphyllorchis.

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Research Article Mon, 29 Jan 2018 14:16:00 +0200
Gastrodia kachinensis (Orchidaceae), a new species from Myanmar https://phytokeys.pensoft.net/article/21348/ PhytoKeys 94: 23-29

DOI: 10.3897/phytokeys.94.21348

Authors: Ye Lwin Aung, Xiao-Hua Jin

Abstract: Gastrodia kachinensis, a new species of Orchidaceae, is described and illustrated from Putao, Kachin State, Myanmar. It is morphologically similar to G. gracilis, presumably its nearest relative, but can be easily distinguished from the latter by having perianth tube with punctate outer surface, verrucose outer surface of sepal lobe, orbicular petals, ovate-elliptic lip with truncate apex and auriculate-clawed base, glabrous lip apex with a pair of twin protuberance-like lamellae and column with a pair of blade-like lateral wings and acute stelidia at apex. Identification key and colour photographs are provided. A preliminary risk-of-extinction assessment, according to the IUCN Red List Categories and Criteria, is given for the new species.

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Research Article Mon, 29 Jan 2018 13:38:12 +0200
The taxonomic identity of three varieties of Lecanorchis nigricans (Vanilleae, Vanilloideae, Orchidaceae) in Japan https://phytokeys.pensoft.net/article/21657/ PhytoKeys 92: 17-35

DOI: 10.3897/phytokeys.92.21657

Authors: Kenji Suetsugu, Chie Shimaoka, Hirokazu Fukunaga, Shinichiro Sawa

Abstract: To elucidate the taxonomy of the Lecanorchis nigricans Honda, 1931 species complex, the present study investigated the detailed morphology of three L. nigricans varieties in Japan. While L. nigricans var. patipetala Y.Sawa, 1980 and L. nigricans var. yakusimensis T.Hashim., 1990 have often been treated as synonyms of L. nigricans var. nigricans, the present study demonstrates that the three varieties are morphologically distinct. More specifically, L. nigricans var. nigricans only produces complete cleistogamous flowers and is distinct from the plants currently called “L. nigricans”, which are identical to the chasmogamous variety L. nigricansvar. patipetala. The other chasmogamous variety L. nigricans var. yakusimensis can be easily distinguished from L. nigricans var. patipetala by its more spatulate tepals and higher cucullate lip. Therefore, the present study provides emended description of the three L. nigricans varieties based on type specimens and specimens collected from type localities. In addition, the isotype specimen of L. nigricans var. patipetala is designated as the lectotype because the holotype has been lost.

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Research Article Wed, 10 Jan 2018 09:32:33 +0200
Spiranthes himalayensis (Orchidaceae, Orchidoideae) a new species from Asia https://phytokeys.pensoft.net/article/19978/ PhytoKeys 89: 115-128

DOI: 10.3897/phytokeys.89.19978

Authors: Siddharthan Surveswaran, Pankaj Kumar, Mei Sun

Abstract: Spiranthes himalayensis is described here as a new species based primarily on molecular phylogenetic evidence followed by morphological comparison with other Asian Spiranthes species. It is distributed widely from southern India to tropical China. Phylogenetic analysis shows its close affinity to S. nivea which is endemic to Taiwan. Morphologically, the new species looks close to S. sinensis and S. hongkongensis. S. himalayensis is an allogamous species which can be differentiated from its allies on the basis of pubescent plant body, floral bract longer or of the same length as that of ovary, petals with blunt apex, labellum width around hypochile same as the width of epichile, epichile widely flabellate or semi-tunicate, column length equal to or more than 1.5mm, clavate operculum attached to the column on the broader part by an arm-like extension emerging from the upper part of column and a well developed rostellum partitioning the stigma and pollinarium.

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Research Article Tue, 14 Nov 2017 11:08:14 +0200
Coelogyne magnifica (Orchidaceae), a new species from northern Myanmar https://phytokeys.pensoft.net/article/19861/ PhytoKeys 88: 109-117

DOI: 10.3897/phytokeys.88.19861

Authors: Bin Yang, Shi-Shun Zhou, Qiang Liu, Kyaw Win Maung, Ren Li, Rui-Chang Quan, Yun-Hong Tan

Abstract: Coelogyne magnifica (Orchidaceae), a new species from Putao, Kachin State, Myanmar, is described and illustrated. It belongs to Coelogyne section Ocellatae Pfitzer & Kraenzl. and it is morphologically similar to Coelogyne corymbosa and C. taronensis, but can be distinguished from these species by its larger flowers, lanceolate sepals and petals, a narrowly ovate lip, which has two bright yellow patches surrounded by shiny brownish red and two fimbriate or erose-lacerate lateral keels on the lip. The major differences between these species are outlined and discussed.

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Research Article Thu, 12 Oct 2017 09:32:03 +0300
Coelogyne putaoensis (Orchidaceae), a new species from Myanmar https://phytokeys.pensoft.net/article/13172/ PhytoKeys 82: 27-34

DOI: 10.3897/phytokeys.82.13172

Authors: Ye Lwin Aung, Xiaohua Jin, André Schuiteman

Abstract: Coelogyne putaoensis, a new species of section Ocellatae from Putao, Kachin State, Myanmar, is described and illustrated. It is morphologically similar to C. taronensis and C. weixiensis, presumably its nearest relatives. An identification key and colour photographs are provided. A preliminary risk-of-extinction assessment according to the IUCN Red List categories and criteria is given for the new species.

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Research Article Thu, 29 Jun 2017 10:06:53 +0300
Epitypification with an emended description of Tropidia connata (Orchidaceae, Epidendroideae, Tropidieae) https://phytokeys.pensoft.net/article/12304/ PhytoKeys 80: 77-85

DOI: 10.3897/phytokeys.80.12304

Authors: Izai Alberto Bruno Sabino Kikuchi, Hirokazu Tsukaya

Abstract: We found several specimens of Tropidia connata, a mycoheterotrophic orchid from Borneo, with features which have never been described in any of the existing literature, namely subterranean tubers. We mainly focus on the importance of the subterranean structures in comparison with the mycoheterotrophic genus Kalimantanorchis from the tribe Tropidieae. This finding of the tuberous structure gives a new insight into the classification of mycoheterotrohic species of Tropidieae and might affect the generic placement of Kalimantanorchis. We made a detailed study on the newly discovered specimens as well as the type, and found more diagnostic characters of T. connata than the previous description. Considering that the type specimen lacks the whole tuberous character, we consequently designate an epitype with a drawing and emend the description.

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Research Article Mon, 5 Jun 2017 11:49:18 +0300
A taxonomic revision of Herminium L. (Orchidoideae, Orchidaceae) https://phytokeys.pensoft.net/article/11215/ PhytoKeys 79: 1-74

DOI: 10.3897/phytokeys.79.11215

Authors: Bhakta Bahadur Raskoti, André Schuiteman, Wei-Tao Jin, Xiao-Hua Jin

Abstract: Herminium (Orchidaceae, Orchidoideae) is a medium-sized genus widespread in the northern hemisphere, with a clear centre of diversity in the Himalayas. We present a comprehensive taxonomic revision of Herminium based on field observations and morphological studies, for which we examined about 2500 specimens. We recognize 49 species grouped into six formal sections, including one new species, Herminium tibeticum, from Tibet. We provide an identification key to the species, descriptions of the species, notes on ecology and distribution, and complete nomenclature for each species, including typifications. We here designate lectotypes for five species and reduce four taxa to synonymy.

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Monograph Wed, 19 Apr 2017 11:00:13 +0300
Lecanorchis tabugawaensis (Orchidaceae, Vanilloideae), a new mycoheterotrophic plant from Yakushima Island, Japan https://phytokeys.pensoft.net/article/10019/ PhytoKeys 73: 125-135

DOI: 10.3897/phytokeys.73.10019

Authors: Kenji Suetsugu, Hirokazu Fukunaga

Abstract: A new species, Lecanorchis tabugawaensis Suetsugu & Fukunaga, sp. nov. from Yakushima Island, Kagoshima Prefecture, Japan, is described and illustrated. Lecanorchis tabugawaensis is similar to L. taiwaniana, but it is easily distinguished by the straight column, the glabrous status of the base of the column, the almost entire and narrow labellum morphology, the shorter part of the column fused with the labellum and the glabrous status of the apical part of the adaxial labellum surface. The new species appears to be restricted to two locations, each consisting of only dozens of mature individuals, and is assessed as Critically Endangered [CR D1] according to IUCN Red List Categories and Criteria.

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Research Article Thu, 3 Nov 2016 15:52:52 +0200
Bulbophyllum pingnanense (Orchidaceae, Epidendroideae, Dendrobiinae), a new species from Fujian, China https://phytokeys.pensoft.net/article/8254/ PhytoKeys 65: 107-112

DOI: 10.3897/phytokeys.65.8254

Authors: Jiangfeng Liu, Si-Ren Lan, Bi-Zhu He, Yi-Chi Liang

Abstract: A new orchid species, Bulbophyllum pingnanense, is described and illustrated from Fujian, China. It is similar to B. brevipedunculatum and B. albociliatum in vegetative and floral morphology, but it can be distinguished from B. brevipedunculatum by having a longer dorsal sepal with longer white ciliate on margin, longer and lanceolate lateral sepals, and a glabrous lip. It can be distinguished from B. albociliatum by having a shorter inflorescence, and a longer dorsal sepal.

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Research Article Thu, 30 Jun 2016 11:27:37 +0300
Taxonomy of Atlantic Central African orchids 5. A new species of Angraecum sect. Conchoglossum (Orchidaceae, Angraecinae) from Gabon and Cameroon https://phytokeys.pensoft.net/article/7017/ PhytoKeys 61: 61-71

DOI: 10.3897/phytokeys.61.7017

Authors: Vladimir Ječmenica, Vincent Droissart, Nausicaa Noret, Tariq Stévart

Abstract: Recent field inventories and taxonomic research in Central Africa have resulted in the discovery of many new orchid species. Five specimens of an apparently new Angraecum species were collected in Gabon and Cameroon. They stand out for their hanging habit and short zig-zag stem. Morphology of leaves and habit is somewhat comparable to A. cultriforme and A. stolzii, two species from East Africa. Flowers of the novelty share the general morphology of A. pyriforme from which the new species is distinguished by being smaller and with a different lip-spur ratio. Here we show that these five specimens represent a new species, described here as Angraecum lanceolatum. The distinguishing traits include thin lanceolate leaves, convolute distally, with a rhombic lip shape. Dichotomous key to four Central African species of sect. Conchoglossum and a table of the diagnostic characters of the seven related Continental African Angraecum taxa are included here. A preliminary assessment of the conservation status of A. lanceolatum is provided, using the IUCN Red List Categories and Criteria.

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Research Article Thu, 25 Feb 2016 13:32:26 +0200
Liparis aphylla (Malaxideae, Orchidaceae), a new leafless record from Peru https://phytokeys.pensoft.net/article/7240/ PhytoKeys 61: 27-35

DOI: 10.3897/phytokeys.61.7420

Authors: Alexander Damian, Paul Ormerod

Abstract: Liparis aphylla G.A.Romero & Garay was previously known only from two herbarium specimens collected in 1945 and 1977 in Ecuador and Colombia, respectively. This little-known species is hereby reported for the first time for Peru. An updated description, line illustration, color photographs and distribution map of L. aphylla, as well as an identification key to the Peruvian species of Liparis are provided.

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Research Article Thu, 25 Feb 2016 11:04:04 +0200
Encyclia inopinata (Orchidaceae, Laeliinae) a new species from Mexico https://phytokeys.pensoft.net/article/6479/ PhytoKeys 58: 87-95

DOI: 10.3897/phytokeys.58.6479

Authors: Carlos Luis Leopardi Verde, German Carnevali, Gustavo A. Romero-González

Abstract: A new species of Encyclia from Mexico, E. inopinata, is described and illustrated. This species is similar to E. diota but it can be distinguished by its usually more robust plants with 2–3 leaves per pseudobulb and its flowers with longer and narrower sepals (1.8±0.1 × 0.63±0.03 cm in E. inopinata versus 1.48 ±0.14 × 0.65±0.06 cm in E. diota) and petals (1.7±0.05 × 0.59±0.05 cm in E. inopinata vs. 1.36 ±0.19 × 0.81±0.13 cm in E. diota), and the labellum with narrower lateral lobes (0.18±0.02 cm in E. inopinata vs. 0.41±0.10 cm in E. diota). Other characters that differentiate these two species are the coriaceous sepals, pink callus, and white anther of Encyclia inopinata (versus fleshy-leathery sepals, white callus, and yellow anther of E. diota). The new species can be found in deciduous forests along the Pacific slope of Oaxaca state, near of the border with Guerrero state, at about 1200 m. It blooms between March and July.

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Research Article Tue, 12 Jan 2016 09:24:46 +0200