Latest Articles from PhytoKeys Latest 11 Articles from PhytoKeys https://phytokeys.pensoft.net/ Fri, 29 Mar 2024 15:21:07 +0200 Pensoft FeedCreator https://phytokeys.pensoft.net/i/logo.jpg Latest Articles from PhytoKeys https://phytokeys.pensoft.net/ Hydrangea xinfeniae (Hydrangeaceae), a new species from Sichuan, China https://phytokeys.pensoft.net/article/114289/ PhytoKeys 238: 65-73

DOI: 10.3897/phytokeys.238.114289

Authors: Jian Ru, Wen-Bin Ju, Heng-Ning Deng, Bo Xu, Xiang Zhou, Chuan-Jiong Liu, Wei Huang

Abstract: Hydrangea xinfeniae W.B.Ju & J.Ru, a new species of Hydrangeaceae from Sichuan Province, China, is described and illustrated. The new species belongs to Hydrangea sect. Dichroa (Lour.) Y.De Smet & Samain, with its distinctive characteristic being the nearly superior ovary. It shares morphological similarities with H. yaoshanensis (Y.C.Wu) Y.De Smet & C.Granados, but can be distinguished by its hirsute trichomes densely covered on the branchlets, leaves, peduncles and pedicels, broadly elliptic to rectangular-elliptic leaf blade with nearly rounded base, coarse teeth leaf margins, 3–4 pairs of lateral veins, corymbose cyme with few and loose branches, lanceolate bract, the calyx tube and lobes margin with sparsely hirsute trichomes, adaxially glabrous and abaxially sparsely hirsute petal, outer whorl filaments are linear, inner ones are awl-shaped, glabrous styles, and the nearly superior ovary. H. xinfeniae sp. nov. currently known from only three relatively small populations of the type locality, and its conservation status is assessed as Data Deficient (DD).

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Research Article Fri, 2 Feb 2024 11:46:17 +0200
First record of the genus Camptotheca (Nyssaceae) in Vietnam and the lectotypification of C. acuminata https://phytokeys.pensoft.net/article/113267/ PhytoKeys 235: 129-136

DOI: 10.3897/phytokeys.235.113267

Authors: Zhen-Hua Zhu, Ngoc Bon Trinh, Thanh Son Hoang, Bo Li

Abstract: As a primary source of anticancer camptothecin, Camptotheca (Nyssaceae) is an economically valuable genus and has long been recorded as endemic to China. Here, Camptotheca is reported as a new record to the flora of Vietnam with the discovery of a wild population of C. acuminata from Lai Chau Province of northern Vietnam. Based on the consultation of relevant literature and type specimens of C. acuminata, a lectotype of the species is designated. Photographic illustrations, morphological description and a distribution map of C. acuminata is provided, and a key to all known species of Nyssaceae in Vietnam is presented, too.

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Research Article Wed, 15 Nov 2023 18:08:32 +0200
When the absence of evidence is not the evidence of absence: Nasa (Loasaceae) rediscoveries from Peru and Ecuador, and the contribution of community science networks https://phytokeys.pensoft.net/article/100082/ PhytoKeys 229: 1-19

DOI: 10.3897/phytokeys.229.100082

Authors: Tilo Henning, Rafael Acuña-Castillo, Xavier Cornejo, Paúl Gonzáles, Edgar Segovia, Akira Armando Wong Sato, Maximilian Weigend

Abstract: Documentation of plant taxa has long been subject to the temporal and spatial selectivity of professional research expeditions, especially in tropical regions. Therefore, rare and/or narrowly endemic species are sometimes known only from very few and very old herbarium specimens. However, these taxa are very important from a conservation perspective. The lack of observations of living plants and confirmation of the actual occurrence of taxa hinders the planning and implementation of effective conservation measures. Community science networks have recently made tremendous contributions to documenting biodiversity in many regions across the globe. The rediscovery of six species of Nasa (Loasaceae) from Peru and Ecuador primarily via the platform iNaturalist, is reported.

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Research Article Fri, 30 Jun 2023 14:01:25 +0300
Taxonomic notes on the genus Deutzia (Hydrangeaceae) from Central China https://phytokeys.pensoft.net/article/96623/ PhytoKeys 220: 51-57

DOI: 10.3897/phytokeys.220.96623

Authors: Song-Zhi Xu, Qi-Liang Gan, Zhen-Yu Li

Abstract: Based on examination of syntype specimens deposited at P, the lectotype for the name Deutzia setchuenensis Franch. is designated here. By consulting literature and specimen records, the type locality of D. setchuenensis var. longidentata Rehder, ‘Chin-Ting shan’ in the protologue is likely a misspelling of ‘Chiuting shan’ which is now called Jiuding shan located in southern Mao county, Sichuan province. In addition, a new variety, Deutzia setchuenensis var. macrocarpa Q.L.Gan, Z.Y.Li & S.Z.Xu from western Hubei, Central China, is described and illustrated. It differs from other varieties of D. setchuenensis Franch. by the orange anthers, broader outer filaments, obtuse inner filaments, and larger fruits.

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Research Article Fri, 24 Feb 2023 18:21:55 +0200
 Hydrangea marunoi (Hydrangeaceae), a new species from Osumi Peninsula, southern Japan https://phytokeys.pensoft.net/article/89452/ PhytoKeys 211: 33-44

DOI: 10.3897/phytokeys.211.89452

Authors: Shuichiro Tagane, Shinji Fujii, Shun K. Hirota, Akiyo Naiki, Tetsukazu Yahara

Abstract: Hydrangea marunoi Tagane & S. Fujii, from the Kimotsuki Mountains in the Ohsumi Peninsula, southern Japan, is described and illustrated. It is morphologically similar to H. alternifolia in having three-petaloid calyx lobes in marginal flowers, but is distinguished by the larger stamen number, and longer styles and seeds. Multiplex ISSR genotyping by sequencing (MIG-seq) demonstrated that the new species is monophyletic and closely related to H. amamiohsimensis and H. moellendorffii rather than H. alternifolia.

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Research Article Tue, 11 Oct 2022 10:56:29 +0300
Taxonomic revision of the peculiar genus Xylopodia (Loasaceae) with a new species from Argentina and Bolivia demonstrating an atypical trans-Andean disjunction https://phytokeys.pensoft.net/article/77827/ PhytoKeys 194: 47-62

DOI: 10.3897/phytokeys.194.77827

Authors: Claudia M. Martín, Christian A. Zanotti, Rafael Acuña-Castillo, Tilo Henning, Juan C. Catari, Maximilian Weigend

Abstract: Loasaceae subfam. Loasoideae are a nearly exclusively American plant group with a center of diversity in Peru. Numerous new taxa have been described over the past decades; one of the most striking discoveries was that of the narrowly endemic Xylopodia with the single species Xylopodia klaprothioides in Peru, Dpto. Cajamarca in 1997. Surprisingly, field studies in the past years have resulted in the discovery of material clearly belonging to the same genus in both Bolivia and northern Argentina, approximately 1500 km SE of the next known population of Xylopodia in Contumazá, Peru. A closer examination shows that Argentinian and Bolivian material belongs to a single species, clearly different from Xylopodia klaprothioides. We here describe Xylopodia laurensis and the entire genus is revised. Both species are illustrated, all aspects of their biology and ecology are portrayed and their threat status is discussed.

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Research Article Fri, 15 Apr 2022 12:13:41 +0300
Molecular phylogeny and taxonomy of the Hydrangea serrata complex (Hydrangeaceae) in western Japan, including a new subspecies of H. acuminata from Yakushima https://phytokeys.pensoft.net/article/64259/ PhytoKeys 188: 49-71

DOI: 10.3897/phytokeys.188.64259

Authors: Shun K. Hirota, Tetsukazu Yahara, Kengo Fuse, Hiroyuki Sato, Shuichiro Tagane, Shinji Fujii, Tadashi Minamitani, Yoshihisa Suyama

Abstract: According to the contemporary classification of Hydrangea native to Japan, H. serrata is a polymorphic species including six varieties. We discovered a plant identified as H. serrata, but morphologically distinct from previously known varieties, in Yakushima island where approximately 50 endemic species are known. To determine the relationship of this plant with previously known varieties, we examined morphology and constructed a highly resolved phylogeny of H. serrata and its relatives using three chloroplast genomic regions, rbcL, trnL intron, psbA-trnH, and two nuclear genomic regions, ITS1 and ITS2, and Multiplex ISSR genotyping by sequencing (MIG-seq). Based on these morphological and phylogenetic observations, we describe Hydrangea acuminata subsp. yakushimensis subsp. nov. as a newly discovered lineage in Yakushima, Japan and propose Hydrangea minamitanii stat. nov. and Hydrangea acuminata subsp. australis stat. nov. which were previously treated as varieties of H. serrata.

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Research Article Wed, 12 Jan 2022 11:08:21 +0200
On Hydrangea peruviana, an endangered species from Ecuador, and Hydrangea oerstedii, very common in Costa Rica and Panama, and seven threatened Central and South American Hydrangeas, which have been confounded with these https://phytokeys.pensoft.net/article/56351/ PhytoKeys 171: 91-153

DOI: 10.3897/phytokeys.171.56351

Authors: Marie-Stéphanie Samain, Carolina Granados Mendoza, Esteban Manuel Martínez Salas

Abstract: Hydrangea section Cornidia, currently consisting of 19 accepted taxa, occurs from Mexico to Chile and Argentina, with one species in southeast Asia. Its representatives are root-climbing lianas which may grow up to 60 m high in the tree canopy of temperate to (sub)tropical forests. Our extensive field work throughout its distribution area, study of herbarium specimens and ongoing molecular studies have resulted in the discovery of species new to science, as well as new insights into the circumscription of many taxa. We here present amended descriptions for seven Hydrangea species of Central and South America and discuss the taxonomical situation of two Colombian Hydrangeas, including an identification key, illustrations, and distribution maps. Field work was carried out in Costa Rica, Panama, Ecuador and Peru, including exploration in areas where the genus had not been collected before. These specimens and observations were complemented with the study of specimens of 41 herbaria of North, Central and South America, as well as Europe. Detailed morphological studies of all species were carried out, based on living plants in their natural habitat, as well as on dried specimens from our own collections and all available herbarium material. Type material was studied in detail for all species concerned. Based on an extensive number of morphological characters, combined with distribution patterns, phenological differences and ecological preferences, including molecular data in most cases, Hydrangea peruviana and H. oerstedii are clearly distinct taxa, as well as the other seven species mentioned here, which had been synonymized with either of these two species. The present study results in the recognition of 26 species in section Cornidia and exemplifies the urgent need for profound taxonomic studies in plants, as in many families we do not dispose of well-circumscribed units for conservation to mitigate the already occurring unprecedented loss of biodiversity.

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Research Article Tue, 26 Jan 2021 11:00:52 +0200
Hydrostachys flabellifera (Hydrostachyaceae), a new species from Madagascar https://phytokeys.pensoft.net/article/58538/ PhytoKeys 167: 45-56

DOI: 10.3897/phytokeys.167.58538

Authors: Zhun Xu, Jing Tian, Solo Hery Jean Victor Rapanarivo, Rokiman Letsara, Rivontsoa A. Rakotonasolo, Guy E. Onjalalaina, Guang-Wan Hu, Qing-Feng Wang

Abstract: Hydrostachys flabellifera, a new species of Hydrostachyaceae found in a stream in Manandriana, Madagascar, is described and illustrated herein. It is similar to H. verruculosa and H. laciniata in morphology, but can be distinguished from them by its leaves with sparsely arranged, flabelliform and palmately parted emergences, obvious rachis and the pattern of segments arranged on the male bracts. Molecular phylogenetic analysis of the nuclear ribosomal internal transcribed spacer (ITS) dataset provides a robust support for it as a new species as well.

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Research Article Fri, 20 Nov 2020 12:59:57 +0200
A new striking and critically endangered species of Nasa (Loasaceae, Cornales) from North Peru https://phytokeys.pensoft.net/article/33927/ PhytoKeys 121: 13-28

DOI: 10.3897/phytokeys.121.33927

Authors: Tilo Henning, Rafael Acuña Castillo, Eric Frank Rodríguez Rodríguez, Luis Felipe García Llatas, Maximilian Weigend

Abstract: Nasa angeldiazioides sp. nov. is described and illustrated. The species is restricted to two forest remnants on the western slope of the northern Peruvian Andes (Dept. Lambayeque) where it is found in the undergrowth of primary forest. The new taxon shows a unique leaf morphology in the family Loasaceae. Molecular and morphological data show that the new species belongs to the Nasa triphylla group. Since the relic forests of the north-western Andes are increasingly threatened by the effects of climate change, i.e. droughts and wildfires, the new species already faces imminent extinction.

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Research Article Wed, 24 Apr 2019 15:59:02 +0300
Cornus × elwinortonii and Cornus × rutgersensis (Cornaceae), new names for two artificially produced hybrids of big-bracted dogwoods https://phytokeys.pensoft.net/article/5829/ PhytoKeys 55: 93-111

DOI: 10.3897/phytokeys.55.9112

Authors: Robert Mattera, Thomas Molnar, Lena Struwe

Abstract: Big-bracted dogwoods (Cornus sp.) are well-known plants in North America and eastern Asia where they occur as wild, generally spring-flowering understory trees. They are also popular ornamental landscape plants, and many economically important cultivars are propagated and sold across North America, Europe, and Asia. Starting in the late 1960s, Elwin Orton of Rutgers University in New Jersey (USA) utilized three geographically disjunct species of dogwoods, C. florida (eastern North America), C. nuttallii (western North America), and C. kousa (East Asia), in an extensive interspecific hybridization program. He was successful in developing the first-ever interspecific F1 hybrids of these species, several of which have become staple items in the ornamental nursery trade due to their enhanced ornamental qualities and resistance to diseases. The original F1 plants are still alive at Rutgers University. While they have been available for decades in horticultural commerce, the interspecific hybrid crosses were never formally described and their scientific hybrid names were never published. For the C. kousa × C. florida hybrids, the name Cornus ‘rutgersensis’ has been used on occasion in the horticultural trade, but without proper citation and description. Here, it is formally named Cornus × rutgersensis Mattera, T. Molnar, & Struwe, hybr. nov. For the C. kousa × C. nuttallii hybrids, no previous name has been used, and it is hereby named Cornus × elwinortonii Mattera, T. Molnar, & Struwe, hybr. nov. The need for providing scientific names for commonly used horticultural hybrids is discussed. Holotype material for both hybrid names was collected from the original F1 hybrids for full documentation, typification, and description. The comparative intermediate development of leaves, inflorescence structures, and fruit types of the hybrids and their parents is discussed and illustrated. Etymology, phenology, and cultivation aspects of these hybrids and their cultivars including backcrosses to C. kousa are also presented.

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Research Article Wed, 5 Aug 2015 00:00:00 +0300