Latest Articles from PhytoKeys Latest 15 Articles from PhytoKeys https://phytokeys.pensoft.net/ Fri, 29 Mar 2024 02:44:07 +0200 Pensoft FeedCreator https://phytokeys.pensoft.net/i/logo.jpg Latest Articles from PhytoKeys https://phytokeys.pensoft.net/ New species of Asclepias (Apocynaceae), Baphia (Leguminosae), Cochlospermum (Bixaceae) and Endostemon (Lamiaceae) from the Kalahari sands of Angola and NW Zambia, with one new combination in Vangueria (Rubiaceae) https://phytokeys.pensoft.net/article/110110/ PhytoKeys 232: 145-166

DOI: 10.3897/phytokeys.232.110110

Authors: David J. Goyder, Nina Davies, Manfred Finckh, Amândio Gomes, Francisco Maiato P. Gonçalves, Paulina Meller, Alan J. Paton

Abstract: Four new species are described from central and eastern Angola and adjacent NW Zambia. All occur in Kalahari sand savannas rich in endemic and more widely distributed geoxylic suffrutices. Despite being known from very few collections, the conservation status of one of these new species is assessed as Least Concern, as these grasslands are nutrient-poor, are in remote sparsely populated areas, and are not threatened with conversion to agriculture. The remaining three are treated as Data Deficient. In addition, one new combination is provided for Ancylanthos rubiginosus Desf. under Vangueria as V. rubiginosa (Desf.) Lantz is an illegitimate later homonym. We also make orthographic corrections to specific epithets commemorating Ilse von Nolde, a collector who made important collections from Quela in Malange in the 1930s.

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Research Article Wed, 20 Sep 2023 16:31:27 +0300
Hoya spectatissima (Gentianales, Apocynaceae), a new species from Yunnan, China https://phytokeys.pensoft.net/article/99420/ PhytoKeys 222: 69-74

DOI: 10.3897/phytokeys.222.99420

Authors: Bine Xue, Erfeng Huang, Gang Yao, Guohua Zhao, Jiuxiang Huang

Abstract: Hoya spectatissima, a new species from Yunnan Province, China, is described and illustrated. Hoya spectatissima is morphologically similar to H. lyi, but can be easily distinguished from the latter by its succulent leaves that are 2‒4.5 cm long (vs. coriaceous leaves that are up to 9 cm long), corolla that is pink to pale pink (vs. yellowish-white) and corona lobes that are sub-rhombic in top view (vs. ovoid in top view).

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Research Article Tue, 21 Mar 2023 10:56:37 +0200
A new species of Hoya R.Br. (Apocynaceae, Asclepiadoideae) from the Philippines https://phytokeys.pensoft.net/article/98275/ PhytoKeys 222: 19-26

DOI: 10.3897/phytokeys.222.98275

Authors: Miguel David De Leon, Derek Cabactulan, Ryu D. Cuerdo, Michele Rodda

Abstract: Hoya medusa M.D.De Leon, Cabactulan, Cuerdo & Rodda, sp. nov. (Apocynaceae, Asclepiadoideae) is described from the Philippines. Even though numerous taxa with a shrubby habit from this area are known, it can be immediately separated because of its urceolate corolla and prominent elongated corona lobes. No other species in the genus possesses such a combination of characters.

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Research Article Mon, 20 Mar 2023 09:44:57 +0200
A taxonomic revision of Cynanchum thesioides (Apocynaceae) with two new synonyms https://phytokeys.pensoft.net/article/93514/ PhytoKeys 219: 11-25

DOI: 10.3897/phytokeys.219.93514

Authors: Cai-Fei Zhang, Dong-Juan Zhang, Miao Liao, Guang-Wan Hu

Abstract: Cynanchum thesioides, a species widely distributed in north-eastern Asia, is revised to include two new synonyms: Vincetoxicum sibiricum f. linearifolium, described from Shandong, China in 1877, but long neglected and Cynanchum gobicum, previously believed to be endemic to Mongolia. Typification for C. thesioides and all its synonyms is given, including lectotypification of V. sibiricum var. australe and V. sibiricum f. linearifolium. An updated description, three figures showing the diverse habitats, habits and variation in morphological characters, and a general distribution map are also provided.

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Research Article Thu, 19 Jan 2023 07:51:08 +0200
Taxonomy of Vincetoxicum s.str. (Asclepiadoideae, Apocynaceae) from southern Asia including three new species and resurrected names https://phytokeys.pensoft.net/article/62514/ PhytoKeys 179: 35-73

DOI: 10.3897/phytokeys.179.62514

Authors: Sayed Afzal Shah, Amir Sultan, Jun Wen, Zahid Ullah, Surat Un Nisa, Zhumei Ren, Muhammad Maqsood Alam, Javed Iqbal, Abdul Samad Mumtaz

Abstract: This paper presents a taxonomic study of genus Vincetoxicum s.str. from southern Asia. Eleven regional endemic species are recognized on the basis of herbarium studies and fieldwork. Three new species are described: V. lenifolium sp. nov. (endemic to Pakistan), V. stewartianum sp. nov. (endemic to India), and V. subcanescens sp. nov. (endemic to Pakistan, Kashmir and Tibet). Three species names, V. cabulicum, V. glaucum and V. kenouriense, previously treated as synonyms of V. glaucum, V. canescens and V. hirundinaria, respectively, are resurrected. A neotype is designated for the Afghani endemic V. cabulicum. A lectotype is chosen from the syntypes of V. glaucum. We resolve the long-standing taxonomic problems in three species complexes: V. arnottianum, V. luridum, V. sakesarense, and V. stocksii; V. glaucum, V. canescens and V. cabulicum; and V. hirundinaria and V. kenouriense. Geo-taxonomic distinctions of southern Asian taxa are highlighted by excluding from henceforth the long misrecognized western Eurasian taxa V. canescens and V. hirundinaria. Furthermore, a detailed account of the genus including illustrations of whole plants, leaves and corona, distribution maps, a taxonomic key, morphological descriptions, synonymy, notes, and information on phenology, distribution and habitats is provided. Finally, provisional conservation assessments are provided, which indicate that V. cardiostephanum and V. sakesarense are critically endangered.

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Research Article Thu, 17 Jun 2021 09:54:05 +0300
A checklist of vascular plants of Ewe-Adakplame Relic Forest in Benin, West Africa https://phytokeys.pensoft.net/article/61467/ PhytoKeys 175: 151-174

DOI: 10.3897/phytokeys.175.61467

Authors: Alfred Houngnon, Aristide C. Adomou, William D. Gosling, Peter A. Adeonipekun

Abstract: Covering 560.14 hectares in the south-east of Benin, the Ewe-Adakplame Relic Forest (EARF) is a micro-refugium that shows insular characteristics within the Dahomey Gap. It is probably one of the last remnants of tropical rain forest that would have survived the late Holocene dry period. Based on intensive field investigations through 25 plots (10 × 50 m size) and matching of herbarium specimens, a checklist of 185 species of vascular plant belonging to 54 families and 142 genera is presented for this forest. In addition to the name for each taxon, we described the life form following Raunkiaer’s definitions, chorology as well as threats to habitat. The Rubiaceae family was the richest (20 species) followed by the Fabaceae (15 species). Life forms showed the preponderance of phanerophytes (88%). The Chorological spectrum was dominated by Guineo-Congolean species (66%). Species richness estimated were 200.52 ± 9.2808 for Bootstrap; 217.62 ± 14.5972; 224.16 ± 15.3725 and 242.67 respectively for Chao, Jacknife1 and Jacknife2. Bootstrap appears to be the estimation closer to the field records. In Benin, EARF is home for Rinorea species described as West African forest bio-indicators and single location for Nesogordonia papaverifera, Mansonia altissima, Englerophytum oblanceolatum, Octolobus spectabilis, Vitex micrantha and most of Drypeteae tribe species (Drypetes aframensis, Drypetes afzelii, Drypetes gilgiana and Drypetes leonensis) recorded in Benin. Our results provides baseline information for further in-depth analysis of vegetation history in Benin by raising the question on the past floristic connection of the Dahomey gap and community engagement in conservation.

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Checklist Mon, 12 Apr 2021 13:21:17 +0300
Hoya pyrifolia (Apocynaceae), a new species from south-western Yunnan, China https://phytokeys.pensoft.net/article/60137/ PhytoKeys 174: 95-106

DOI: 10.3897/phytokeys.174.60137

Authors: Er-Feng Huang, Gang Yao, Ri-Hong Jiang, Lei-Lei Yang, Wang Xi, Zhong-Shuai Zhang, Xian-Chun Zhang

Abstract: Hoya pyrifolia, a new species of Apocynaceae from Yunnan Province, China, is described and illustrated. Results from phylogenetic analyses, based on combined DNA fragments of the nuclear ribosomal external transcribed spacer (ETS), intergeneric transcribed spacer (ITS) and three plastid DNA fragments (matK, psbA-trnH and trnT-trnL), showed that the new species was nested within a clade, including Hoya species distributed in the subtropical foothills of the Himalayas and the Tibet-Sichuan Plateau. Morphologically, the new species can be distinguished from its close relatives by its pyriform and slightly pubescent leaves, as well as the 4-flowered inflorescences.

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Research Article Fri, 12 Mar 2021 10:32:57 +0200
Taxonomic revision of Ceropegia sect. Huernia (Asclepiadoideae, Apocynaceae) in Saudi Arabia with three new combinations https://phytokeys.pensoft.net/article/58867/ PhytoKeys 174: 47-80

DOI: 10.3897/phytokeys.174.58867

Authors: Samah A. Alharbi, Rahmah N. Al-Qthanin

Abstract: This study provides a taxonomic revision for Ceropegia sect. Huernia in the flora of Saudi Arabia. Forty-six quantitative and qualitative morphological characters were analysed using principal component analysis (PCA), principal coordinates analysis (PCoA) and the unweighted pairs group using mean average (UPGMA) to separate and help delimit taxa. We propose to reduce the number of species reported in Saudi Arabia from 11 to four: C. khalidbinsultanii comb. nov., C. laevis, C. lodarensis and C. macrocarpa. This study also suggested reducing two names to varietal level under C. lodarensis (var. foetida comb. nov. and var. rubrosticta comb. nov.). A key to the species, detailed morphological descriptions, illustrations, distribution maps, ecology, etymology and preliminary conservation assessments are provided that follow IUCN criteria.

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Research Article Fri, 5 Mar 2021 16:47:32 +0200
Heterostemma cucphuongense (Apocynaceae, Asclepiadoideae), a new species from Vietnam https://phytokeys.pensoft.net/article/50029/ PhytoKeys 148: 119-124

DOI: 10.3897/phytokeys.148.50029

Authors: The Bach Tran, Le Ngoc Han, Do Van Hai, Bui Hong Quang, Nguyen Thi Thanh Huong, Bui Thu Ha, Tran Van Hai, Michele Rodda

Abstract: Heterostemma cucphuongense (Apocynaceae, Asclepiadoideae), a new species from Vietnam is described, illustrated and compared with the similar species Heterostemma succosum Kerr. Heterostemma cucphuongense differs from H. succosum by the morphology of the rachis of the inflorescence, the margins of the corolla lobes and the colour of the adaxial surface of the corolla.

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Research Article Tue, 26 May 2020 14:07:35 +0300
A new species of Dischidia (Apocynaceae, Asclepiadoideae) from North-eastern Thailand https://phytokeys.pensoft.net/article/47977/ PhytoKeys 144: 23-30

DOI: 10.3897/phytokeys.144.47977

Authors: Wilawan Promprom, Wannachai Chatan

Abstract: Dischidia phuphanensis Chatan & Promprom, a new species from north-eastern Thailand, is described and illustrated. The new species is similar to D. tonkinensis Costantin, but is distinguished by the shape of its leaves, the apices of the staminal corona lobes, the colour of the corolla and the absence of a corolline corona. The distinguishing characters of similar species are discussed. A key for the identification of those species in Thailand without pitcher-like leaves is provided.

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Research Article Tue, 17 Mar 2020 10:25:00 +0200
Marsdenia yarlungzangboensis (Apocynaceae, Asclepiadoideae), a new species from Xizang, China https://phytokeys.pensoft.net/article/34152/ PhytoKeys 130: 85-92

DOI: 10.3897/phytokeys.130.34152

Authors: Cheng Liu, Ji-Dong Ya, Yun-Hong Tan, Hua-Jie He, Gui-Jun Dong, De-Zhu Li

Abstract: Marsdenia yarlungzangboensis (Apocynaceae, Asclepiadoideae), a new species from Motuo County, southeastern Xizang of China, is described and illustrated. It is morphologically similar to M. medogensis, M. tenii and M. yuei, the major differences between the new species and the morphological relatives are outlined and discussed. A diagnostic key to the new species and its closely related species in China is provided.

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Research Article Thu, 29 Aug 2019 10:59:08 +0300
Ceropegia jinshaensis (Apocynaceae), a new species from northwestern Yunnan, China https://phytokeys.pensoft.net/article/34311/ PhytoKeys 130: 41-48

DOI: 10.3897/phytokeys.130.34311

Authors: Zhi-Kun Wu, Jie Cai, Lei Cai, De-Tuan Liu

Abstract: Ceropegia jinshaensis D.T.Liu & Z.K.Wu (Asclepiadoideae, Apocynaceae), a new species from northwestern Yunnan along the upper Yangtze river of China, is described and illustrated. This species is similar to C. meleagris H. Huber, C. dorjei C. E. C. Fischer and C. aridicola W. W. Smith, but can be distinguished easily by its leaf shape and floral features, especially the corolla shape and size, the interior of corolla tube and coronal characters.

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Research Article Thu, 29 Aug 2019 10:59:04 +0300
Asclepias speciosa (Apocynaceae, Asclepiadoideae): a rare or unrecognized alien species in Europe? https://phytokeys.pensoft.net/article/33573/ PhytoKeys 121: 29-41

DOI: 10.3897/phytokeys.121.33573

Authors: Zigmantas Gudžinskas, Lukas Petrulaitis, Egidijus Žalneravičius

Abstract: Studies on populations of Asclepias syriaca L. in Lithuania revealed the occurrence of a new alien plant species, the North American native Asclepias speciosa Torr. (Apocynaceae, Asclepiadoideae), in southern parts of Lithuania – the first report of the latter species in Europe. Interestingly, a thorough analysis of herbarium specimens revealed that A. speciosa had first been collected in Lithuania in 1962, but the specimen was misidentified at the time as A. syriaca. The newly discovered population of A. speciosa occupies mesic grasslands, tall-herb fringe communities and arable field habitats. Sexual reproduction of this species was not recorded; it spreads locally by means of vegetative reproduction. We present here an exhaustive analysis of morphological characteristics and differences between A. speciosa and A. syriaca and other species of the genus, as well as a key for identification of alien Asclepias species in Europe. We predict that the effect of A. speciosa on native habitats and communities, and its economic impact, are comparable to those of the highly invasive A. syriaca. Although A. speciosa currently occurs very rarely as an alien species in Europe, its existence in other regions of Europe is highly probable.

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Research Article Wed, 24 Apr 2019 15:59:05 +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
Hoya of the Philippines part I. Hoya migueldavidii (Apocynaceae, Asclepiadoideae), a new species from Northern Mindanao, Philippines https://phytokeys.pensoft.net/article/12872/ PhytoKeys 80: 105-112

DOI: 10.3897/phytokeys.80.12872

Authors: Derek D. Cabactulan, Michele Rodda, Reynold Pimentel

Abstract: A new species of Hoya R.Br. from Mindanao (Philippines), Hoya migueldavidii Cabactulan, Rodda & Pimentel, is described and illustrated. It is a member of Hoya section Acanthostemma (Blume) Kloppenb. that is particularly speciose in the Philippines. It is compared with the similar Hoya loheri Kloppenb, also endemic of the Philippines, from which it differs in indumentum of the vegetative parts (pubescent vs. glabrous), the shape of the corolla (almost spherical vs. partly flattened) and the type of gynostegium (not stipitate vs. stipitate)

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Research Article Mon, 5 Jun 2017 10:33:15 +0300