Latest Articles from PhytoKeys Latest 23 Articles from PhytoKeys https://phytokeys.pensoft.net/ Fri, 29 Mar 2024 01:38:17 +0200 Pensoft FeedCreator https://phytokeys.pensoft.net/i/logo.jpg Latest Articles from PhytoKeys https://phytokeys.pensoft.net/ Begonia fimbristipula subsp. siamensis (sect. Diploclinium, Begoniaceae), a new taxon of the megadiverse genus endemic to Thailand https://phytokeys.pensoft.net/article/85699/ PhytoKeys 218: 1-10

DOI: 10.3897/phytokeys.218.85699

Authors: Sirilak Radbouchoom, Thamarat Phutthai, Harald Schneider

Abstract: The genus Begonia has not only been recognised to be one of the mega-diverse plant genera but also as one found to comprise many undiscovered species. In particular, the increase of extensive field surveys in tropical regions of Southeast Asia has added to the discovery of many new species that are often found only in a few localities. In this study, the new taxon Begonia fimbristipula subsp. siamensis subsp. nov. from Thailand is described. The Thailand accessions are highly similar in their morphology to accessions of B. fimbristipula from southern China but differ in their tuber shape, peduncle trichomes, petiole trichomes and number of female tepals. The new taxon has been found only in the northern parts of Thailand occurring at elevations above 1,300 meters. The new findings not only contribute to our knowledge of the plant diversity of Thailand but provide also critical information contributing to the protection of this species. In China, this species is endangered which is of special concern given its utilisation as a medical herb in traditional Chinese medicine. Considering IUCN Red List Categories, the new subspecies is considered to be Vulnerable. The disjunct distribution of the two subspecies of B. fimbristipula encourages urgently needed comparative taxonomic studies across the Indo-Burma biodiversity hotspot.

HTML

XML

PDF

]]>
Research Article Tue, 10 Jan 2023 20:36:20 +0200
Begonia parvibracteata, a new species in Begonia sect. Platycentrum (Begoniaceae) from Guangxi of China, based on morphological and molecular evidence https://phytokeys.pensoft.net/article/90004/ PhytoKeys 214: 27-38

DOI: 10.3897/phytokeys.214.90004

Authors: Xin-Xin Feng, Xiao-Feng Huang, Yu-Ni Huang, Zhi-Xian Liu, Ren-Kun Li, Jin-Ye Zhou, Wei Guo, Xiao-Yan Chen, Dai-Ke Tian

Abstract: The previously reported begonias in a limestone forest of Guangxi mainly belong to Begonia sect. Coelocentrum Irmscher. In this article, we described and illustrated a new species in sect. Platycentrum (Klotzsch) A.DC., Begonia parvibracteata X.X.Feng, R.K.Li & Z.X.Liu, which was discovered in a karst forest of south-western Guangxi. The begonia shows high morphological similarity to B. subhowii S.H. Huang and B. psilophylla Irmscher, but differs from the latter two in its narrower oblique-ovate asymmetric leaf blade, 4 (occasionally 6) tepals of pistillate flower and smaller membranous inflorescence bracts. Molecular phylogenetic analysis, based on ITS sequence data, supports the new species as monophyletic and distinct from B. subhowii and B. psilophylla. Considering its narrow distribution and the disturbance of human activities, the conservation status of new taxon is evaluated as “Vulnerable” (VU B1, B2 ab (i, iv, v), D2) according to the IUCN Red List Categories and Criteria.

HTML

XML

PDF

]]>
Research Article Tue, 22 Nov 2022 18:10:42 +0200
A new species (Begonia giganticaulis) of Begoniaceae from southern Xizang (Tibet) of China https://phytokeys.pensoft.net/article/75854/ PhytoKeys 187: 189-205

DOI: 10.3897/phytokeys.187.75854

Authors: Dai-Ke Tian, Wen-Guang Wang, Li-Na Dong, Yan Xiao, Min-Min Zheng, Bin-Jie Ge

Abstract: Begonia giganticaulis, a huge new species in Begonia sect. Platycentrum of Begoniaceae from southern Xizang (Tibet) of China, is described. Morphologically, it is mostly similar to B. longifolia and B. acetosella, but clearly differs from the former mainly by its dioecious and taller plants, sparse hairs on abaxial veins, longer inflorescence, unique shape of fruits, and differs from the latter mainly by its late and longer flowering time, 6-tepals of female flower and 3-loculed ovary. The phylogenetic analyses also support the separation of the new species from other taxa. Based on the current data, its conservation status is assigned to Endangered (B2a) according to the IUCN Red List Categories and Criteria.

HTML

XML

PDF

]]>
Research Article Thu, 30 Dec 2021 12:41:05 +0200
Begonia pseudoedulis, a new species in Begonia sect. Platycentrum (Begoniaceae) from southern Guangxi of China https://phytokeys.pensoft.net/article/69074/ PhytoKeys 182: 113-124

DOI: 10.3897/phytokeys.182.69074

Authors: Xin-Xin Feng, Yan Xiao, Zhi-Xian Liu, Ren-Kun Li, Dan Wei, Dai-Ke Tian

Abstract: Begonia pseudoedulis, a new species in Begonia sect. Platycentrum (Klotzsch) A.DC. (Begoniaceae) from southern Guangxi of China, is here described and illustrated. It morphologically resembles B. edulis H.Lév. and B. dielsiana E.Pritz. ex Diels but differs easily by its hairy petioles and inflorescences, and red hispidulous flower tepals, ovary and capsules. The molecular phylogenetic analysis based on ITS supported that the new species was a monophyletic lineage, separating from both B. dielsiana and B. edulis. Due to its isolated distribution with several small populations, which are possibly disturbed by human activities, the species is considered as “Near Threatened” (NT) according to the IUCN Red List Categories and Criteria.

HTML

XML

PDF

]]>
Research Article Fri, 1 Oct 2021 08:00:02 +0300
Begonia catbensis (sect. Coelocentrum, Begoniaceae), a new species from northern Vietnam https://phytokeys.pensoft.net/article/65812/ PhytoKeys 179: 1-12

DOI: 10.3897/phytokeys.179.65812

Authors: Li-Na Dong, Khang Sinh Nguyen, Yu-Min Shui, Hieu Quang Nguyen, Wei‑Bin Xu, Xuan Khu Nguyen

Abstract: Begonia catbensis, a new species in Begonia sect. Coelocentrum is described and illustrated. The new species was discovered in lowland limestone hills at Cat Ba National Park and can be easily distinguished from all its congeners by having dendritic hairs on the petiole, adaxial veins and stipules, fimbriate bracts and bracteoles, dense conical bullae on the upper surface of the leaf blade, two tepals in the pistillate flowers and a glabrescent ovary with verrucose wings. Based on IUCN Criteria, the species is currently assessed as “Endangered” (D).

HTML

XML

PDF

]]>
Research Article Thu, 17 Jun 2021 09:54:29 +0300
Begonia shenzhenensis, a new species of Begoniaceae from Guangdong, China https://phytokeys.pensoft.net/article/66462/ PhytoKeys 178: 171-177

DOI: 10.3897/phytokeys.178.66462

Authors: Dai-Ke Tian, Bin Chen, Yan Xiao, Min-Min Zheng, Bin-Jie Ge

Abstract: Begonia shenzhenensis D.K.Tian & X.Yun Wang, sp. nov., a new species in Begonia sect. Platycentrum of Begoniaceae from Shenzhen of Guangdong province, China, is described and illustrated. Morphologically, it is primarily similar to B. coelocentroides in the same section but differs by its denser hairs on leaf, petiole, and pedicel, abtuse anther apex, hairy ovary, and narrower adaxial fruit wing. Based on only one small population found to date, its conservation status is assigned to Critical Endangered according to the IUCN Red List Categories and Criteria.

HTML

XML

PDF

]]>
Research Article Fri, 4 Jun 2021 10:13:07 +0300
Zehneria grandibracteata (Cucurbitaceae), an overlooked new species from western Kenyan forests https://phytokeys.pensoft.net/article/57399/ PhytoKeys 165: 85-98

DOI: 10.3897/phytokeys.165.57399

Authors: Neng Wei, Zhi-Xiang Zhong, David Kimutai Melly, Solomon Kipkoech, Benjamin Muema Watuma, Veronicah Mutele Ngumbau, Peris Kamau, Guang-Wan Hu, Qing-Feng Wang

Abstract: Zehneria grandibracteata, a new species of Cucurbitaceae from western Kenya, is described here, based on morphological and molecular data. It has long been misidentified as the widely-distributed species Z. scabra. However, it differs by its ovate leafy probract at the base of the inflorescences, subglabrous condition of the entire plant, shorter receptacle-tube and filaments, as well as denser and sessile inflorescences. Furthermore, the molecular phylogenetic analysis of Zehneria, based on nrITS sequences, further supports the argument that Z. grandibracteata should be segregated from Z. scabra.

HTML

XML

PDF

]]>
Research Article Wed, 28 Oct 2020 11:28:14 +0200
Begonia guangdongensis, a new species of Begonia (Begoniaceae) from Guangdong, China https://phytokeys.pensoft.net/article/51913/ PhytoKeys 162: 29-36

DOI: 10.3897/phytokeys.162.51913

Authors: Wen-Hui Tu, Bing-Mou Wang, Yi Huang, Gang Yao, Jiu-Xiang Huang, Yu-Ling Li

Abstract: A new species of Begonia section Coelocentrum, B. guangdongensis W.H. Tu, B.M. Wang & Y.L. Li from Guangdong Province, China, is described and illustrated here. Morphologically, the new species is most similar to B. biflora T. C. Ku and B. longistyla Y. M. Shui & W. H. Chen, but differs from B. biflora by its rugose leaves and glabrous capsules and from B. longistyla by its glabrous stipules without ciliate margin, densely hirsute-pilose leaves and obtuse apex of bracts. Additionally, it is also somewhat similar to B. chongzuoensis Yan Liu, S. M. Ku & C.-I Peng, but there are significant distinctions in their stipules, leaves and bracts. The conservation status of B. guangdongensis is assessed as Critically Endangered (CR), according to the IUCN Red List Categories and Criteria.

HTML

XML

PDF

]]>
Research Article Wed, 7 Oct 2020 12:16:19 +0300
Several new records, synonyms, and hybrid-origin of Chinese begonias https://phytokeys.pensoft.net/article/50805/ PhytoKeys 153: 13-35

DOI: 10.3897/phytokeys.153.50805

Authors: Dai-Ke Tian, Yan Xiao, Yan-Ci Li, Ke-Jian Yan

Abstract: Begonia is a mega-genus with about 2500 species by most estimates, with China having over 210 accepted species. After field surveys, literature review and examination of herbarium specimens, some new taxa, new records, synonyms and the hybrid-origin of some taxa have been confirmed. Here, we report that Begonia dioica Buch.-Ham. ex D.Don and B. flagellaris Hara, both from Xizang (Tibet) are new to China; Begonia lipingensis Hance, B. muliensis T.T.Yu and B. sizemoreae Kiew are synonyms of B. circumlobata Hance, B. taliensis Gagnepain and B. longiciliata C.Y.Wu, respectively; and Begonia × lancangensis S.H.Huang and B. × malipoensis S.H.Huang & Y.M.Shui are natural hybrids.

HTML

XML

PDF

]]>
Research Article Thu, 16 Jul 2020 10:33:38 +0300
An updated checklist of Begonia (Begoniaceae) in Laos, with two new species and five new records https://phytokeys.pensoft.net/article/46718/ PhytoKeys 138: 187-201

DOI: 10.3897/phytokeys.138.46718

Authors: Hong-Bo Ding, Mya Bhone Maw, Bin Yang, Somsanith Bouamanivong, Yun-Hong Tan

Abstract: Two new species of Begonia L. (Begoniaceae), B. laotica (sect. Parvibegonia) and B. hypoleuca (sect. Reichenheimia), from north Laos are described and illustrated. Begonia augustinei, B. dryadis, B. lancangensis, B. sizemoreae and B. sillentensis subsp. mengyangensis were newly recorded taxa in Laos. Furthermore, an updated checklist of Begonia of Laos is also compiled.

HTML

XML

PDF

]]>
Research Article Fri, 10 Jan 2020 11:17:31 +0200
Taxonomic studies on Begonia (Begoniaceae) in Myanmar I: three new species and supplementary description of Begonia rheophytica from Northern Myanmar https://phytokeys.pensoft.net/article/38721/ PhytoKeys 138: 203-217

DOI: 10.3897/phytokeys.138.38721

Authors: Mya Bhone Maw, Hong-Bo Ding, Bin Yang, Pyae Pyae Win, Yun-Hong Tan

Abstract: Three new species of Begonia (B. chenii, B. putaoensis and B. crassitepala) belonging to Begonia section Platycentrum and a supplementary description of B. rheophytica with a detailed description of female flowers from Putao, Kachin State, Northern Myanmar, are described and illustrated. All the new species are endemic to Northern Myanmar and can be easily distinguished from other species among the section Platycentrum. A detailed description, photographs, habitat, distribution and a comparison with the most related allied species for all new species are provided.

HTML

XML

PDF

]]>
Research Article Fri, 10 Jan 2020 10:38:57 +0200
Begonia yenyeniae (Begoniaceae), a new species from Endau Rompin National Park, Johor, Malaysia https://phytokeys.pensoft.net/article/25846/ PhytoKeys 110: 23-37

DOI: 10.3897/phytokeys.110.25846

Authors: Joanne Pei-Chih Tan, Sheh May Tam, Ruth Kiew

Abstract: Begonia yenyeniae is a new species of horticultural value known only from the Endau Rompin National Park, Peninsular Malaysia. It is similar to Begonia rajah with which it had previously been confused in the number of tepals and leaf characters. The new species is compared with three similar species, B. foxworthyi, B. rajah and B. reginula and photographs of all four species and descriptions of B. yenyeniae and B. rajah are provided. Molecular analysis using the ndhF-rpl132 chloroplast marker confirms the four species as distinct. Amongst native species, the three variegated species, B. yenyeniae, B. rajah and B. reginula, are some of the most popular Malaysian begonias in cultivation. Based on its restricted distribution, Begonia yenyeniae, under the IUCN Red List Categories and Criteria, is assessed as Critically Endangered.

HTML

XML

PDF

]]>
Research Article Thu, 1 Nov 2018 12:13:41 +0200
Begonia medogensis, a new species of Begoniaceae from Western China and Northern Myanmar https://phytokeys.pensoft.net/article/25392/ PhytoKeys 103: 13-18

DOI: 10.3897/phytokeys.103.25392

Authors: Jian-Wu Li, Yun-Hong Tan, Xi-Long Wang, Cheng-Wang Wang, Xiao-Hua Jin

Abstract: Begonia medogensis JianW.Li, Y.H.Tan & X.H.Jin, a new species of Begoniaceae, is described and illustrated by colour photographs. Begonia medogensis is distributed in western China and northern Myanmar. It has erect stems, is tuberless, has many triangular to lanceolate leaves, base slightly asymmetric, margins remotely and irregularly denticulate; staminate flowers have 4 perianth segments, with outer 2 segments broadly ovate, inner 2 spathulate; pistillate flowers have 5 perianth segments, unequal, outer 4 broadly ovate, inner 1 spathulate. The new species is assigned to section Platycentrum and can easily be distinguished from the other species in the section.

HTML

XML

PDF

]]>
Research Article Mon, 2 Jul 2018 12:18:28 +0300
Rediscovery and amended descriptions of Begonia kingdon-wardii (Begoniaceae) from North Myanmar https://phytokeys.pensoft.net/article/21753/ PhytoKeys 94: 59-64

DOI: 10.3897/phytokeys.94.21753

Authors: Wen-Hong Chen, Xiao-Hua Jin, Yu-Min Shui

Abstract: Begonia kingdon-wardii Tebbitt was rediscovered in 2014 from Myanmar after 67 years based on its last collection in 1937. Its previously unknown female flower and inaccurate morphology of leaf and ovary have been additionally described. This species belongs to Begonia sect. Sphenanthera (Hassk.) Warb. due to its dioecious habit, 3-locular ovary, berry fruits and thick placenta segments. Morphologically, it is similar to Begonia gulinqingensis S. H. Huang & Y. M. Shui in the leaf shape, placentation and fruit shape, but different in its dioecious plants, pliciform leaves, two-petalled female flowers and berry fruits. The rediscovery of this amazing living species will attract significant interest for scientific research and horticultural application.

HTML

XML

PDF

]]>
Research Article Mon, 29 Jan 2018 11:22:31 +0200
Seven new species of Begonia (Begoniaceae) in Northern Vietnam and Southern China https://phytokeys.pensoft.net/article/23248/ PhytoKeys 94: 65-85

DOI: 10.3897/phytokeys.94.23248

Authors: Wen-Hong Chen, Sirilak Radbouchoom, Hieu Quang Nguyen, Hiep Tien Nguyen, Khang Sinh Nguyen, Yu-Min Shui

Abstract: Since 2016, KIB (Kunming Institute of Botany) and CPC (Centre for Plant Conservation of Vietnam) have conducted several surveys in the transboundary karst regions in Northern Vietnam and Southern China and seven new species in the genus Begonia Linn. (Begoniaceae) are firstly described. Amongst them, two species, Begonia albopunctata Y.M. Shui, W.H. Chen & H.Q. Nguyen and B. erectocarpa H.Q. Nguyen, Y.M. Shui & W.H. Chen, respectively belong to section Sphenanthera with berry fruits and section Leprosae with clavate berry fruits; four species, B. gulongshanensis Y.M. Shui & W. H. Chen, B. minissima H.Q. Nguyen, Y.M. Shui & W.H. Chen, B. mollissima Y.M. Shui, H.Q. Nguyen & W.H. Chen, B. rhytidophylla Y.M. Shui & W.H. Chen, belong to section Coelocentrum with parietal placentation; one species, Begonia bambusetorum H.Q. Nguyen, Y.M. Shui & W.H. Chen, belongs to section Diploclinium with 3-loculed ovary and capsules. The diagnostic characters of these species are described and illustrated in the text and photographs.

HTML

XML

PDF

]]>
Research Article Mon, 29 Jan 2018 09:46:29 +0200
Monograph of Coccinia (Cucurbitaceae) https://phytokeys.pensoft.net/article/5797/ PhytoKeys 54: 1-166

DOI: 10.3897/phytokeys.54.3285

Authors: Norbert Holstein

Abstract: This monograph deals with all 95 names described in the Cucurbitaceae genus Coccinia and recognizes 25 species. Taxonomic novelties are Coccinia adoensis var. aurantiaca (C.Jeffrey) Holstein, stat. nov., C. sessilifolia var. variifolia (A.Meeuse) Holstein, stat. nov., and C. adoensis var. jeffreyana Holstein, var. nov. For the 25 species 3157 collections were examined, of which 2024 were georeferenced to produce distribution maps. All species are distributed in sub-Saharan Africa with one species, C. grandis, extending from Senegal in West Africa east to Indonesia and being naturalized on Pacific Islands, in Australia, the Caribbean, and South America. Coccinia species are dioecious creepers or climbers with simple or bifid tendrils that occupy a range of habitats from arid scrubland, woodlands to lowland rainforest and mist forest. The corolla of Coccinia species is sympetalous, usually pale yellow to orange, and 1 to 4.5 cm long. Pollination is by bees foraging for pollen or nectar. After pollination, the developing ovary often exhibits longitudinal mottling, which usually disappears during maturation. All species produce berries with a pericarp in reddish colors (orange-red through to scarlet red), hence the generic name. The globose to cylindrical fruits contain numerous grayish-beige flat to lenticular seeds. Chromosome numbers are 2n = 20, 24, and 22 + XX/XY. Many Coccinia species are used for food, either as roasted tubers, greens as spinach, or the fruits as vegetables. Medicinal value is established in C. grandis, of which leaves and sap are used against diabetes.

HTML

XML

PDF

]]>
Monograph Mon, 3 Aug 2015 00:00:00 +0300
Three new species of Begonia (Begoniaceae) from Bahia, Brazil https://phytokeys.pensoft.net/article/4497/ PhytoKeys 44: 1-13

DOI: 10.3897/phytokeys.44.7993

Authors: Bernarda de Souza Gregório, Jorge Antonio Silva Costa, Alessandro Rapini

Abstract: The taxonomic treatment of Begoniaceae for the state of Bahia, Brazil, led to the recognition of three new species of Begonia with narrow distributions, which are described and illustrated here: B. delicata Gregório & J.A.S. Costa, sp. nov. is a herb restricted to the region of the Recôncavo; B. elianeae Gregório & J.A.S. Costa, sp. nov. is a shrub endemic to the Atlantic forest of the southern part of the state; and B. paganuccii Gregório & J.A.S. Costa, sp. nov. is a subshrub known only from the type material, collected in the Piedmont of Paraguaçu. Notes on morphology, comparisons with morphologically similar species, etymology, geographic distribution, habitat and phenological data for each species are also presented. Furthermore, keys are provided as an aid to separating the new species from congeneric species that occur in their surroundings. Due to the sparse knowledge of the new species, there is as yet insufficient data to accurately assess their conservation status.

HTML

XML

PDF

]]>
Research Article Tue, 13 Jan 2015 00:00:00 +0200
The systematics of the worldwide endoparasite family Apodanthaceae (Cucurbitales), with a key, a map, and color photos of most species https://phytokeys.pensoft.net/article/1521/ PhytoKeys 36: 41-57

DOI: 10.3897/phytokeys.36.7385

Authors: Sidonie Bellot, Susanne Renner

Abstract: Using morphological, nuclear, and mitochondrial data, we here revise the taxonomy of Apodanthaceae and allocate the 36 names published in the family to ten biological species in two genera, Apodanthes and Pilostyles. All species are endo-parasites that live permanently inside trees or shrubs of the families Salicaceae or Fabaceae and that only emerge to flower. Because of this life history, Apodanthaceae are among the least known families of flowering plants. Nevertheless, the World’s herbaria as of 2013 hold at least 785 collections that, in combination with DNA phylogenies, permit well-founded species circumscriptions and geographic range maps. We also provide a key to all species, discuss the newly accepted or synonymized names, and make available color photos of six of the ten species.

HTML

XML

PDF

]]>
Research Article Wed, 30 Apr 2014 00:00:00 +0300
The Cucurbitaceae of India: Accepted names, synonyms, geographic distribution, and information on images and DNA sequences https://phytokeys.pensoft.net/article/1454/ PhytoKeys 20: 53-118

DOI: 10.3897/phytokeys.20.3948

Authors: Susanne Renner, Arun Pandey

Abstract: The most recent critical checklists of the Cucurbitaceae of India are 30 years old. Since then, botanical exploration, online availability of specimen images and taxonomic literature, and molecular-phylogenetic studies have led to modified taxon boundaries and geographic ranges. We present a checklist of the Cucurbitaceae of India that treats 400 relevant names and provides information on the collecting locations and herbaria for all types. We accept 94 species (10 of them endemic) in 31 genera. For accepted species, we provide their geographic distribution inside and outside India, links to online images of herbarium or living specimens, and information on publicly available DNA sequences to highlight gaps in the current understanding of Indian cucurbit diversity. Of the 94 species, 79% have DNA sequences in GenBank, albeit rarely from Indian material. The most species-rich genera are Trichosanthes with 22 species, Cucumis with 11 (all but two wild), Momordica with 8, and Zehneria with 5. From an evolutionary point of view, India is of special interest because it harbors a wide range of lineages, many of them relatively old and phylogenetically isolated. Phytogeographically, the north eastern and peninsular regions are richest in species, while the Jammu Kashmir and Himachal regions have few Cucurbitaceae. Our checklist probably underestimates the true diversity of Indian Cucurbitaceae, but should help focus efforts towards the least known species and regions.

HTML

XML

PDF

]]>
Checklist Mon, 11 Mar 2013 00:00:00 +0200
Melothria domingensis (Cucurbitaceae), an endangered Caribbean endemic, is a Cayaponia https://phytokeys.pensoft.net/article/1444/ PhytoKeys 18: 45-60

DOI: 10.3897/phytokeys.18.3914

Authors: Hanno Schaefer, Michael Nee

Abstract: The Neotropical genus Melothria (Benincaseae, Cucurbitaceae) is a small group of yellow- or white-flowered climbers with small to medium-sized fruits. In 1899, Alfred Cogniaux described a species from montane rainforest in Haiti as Melothria domingensis, presumably based on the overall similarity in habit, leaf shape, and fruit morphology of his incomplete herbarium material to other Central American Melothria species. Melothria domingensis is still rare in European and American herbaria and the species has never been studied in detail. We here present molecular and morphological analyses, which show that the species is misplaced in Melothria and instead belongs in the distantly related tribe Cucurbiteae in the genus Cayaponia. We illustrate the species, provide the formal transfer and an extended description, and discuss the phylogenetic, biogeographic and ecological implications, including the finding that most likely bee- and not bat-pollination is ancestral in Cayaponia.

HTML

XML

PDF

]]>
Research Article Thu, 6 Dec 2012 00:00:00 +0200
Synopsis of Trichosanthes (Cucurbitaceae) based on recent molecular phylogenetic data https://phytokeys.pensoft.net/article/1421/ PhytoKeys 12: 23-33

DOI: 10.3897/phytokeys.12.2952

Authors: Hugo De Boer, Mats Thulin

Abstract: The snake gourd genus, Trichosanthes, is the largest genus in the Cucurbitaceae family, with over 90 species. Recent molecular phylogenetic data have indicated that the genus Gymnopetalum is to be merged with Trichosanthes to maintain monophyly. A revised infrageneric classification of Trichosanthes including Gymnopetalum is proposed with two subgenera, (I) subg. Scotanthus comb. nov. and (II) subg. Trichosanthes, eleven sections, (i) sect. Asterospermae, (ii) sect. Cucumeroides, (iii) sect. Edulis, (iv) sect. Foliobracteola, (v) sect. Gymnopetalum, (vi) sect. Involucraria, (vii) sect. Pseudovariifera sect. nov., (viii) sect. Villosae stat. nov., (ix) sect. Trichosanthes, (x) sect. Tripodanthera, and (xi) sect. Truncata. A synopsis of Trichosanthes with the 91 species recognized here is presented, including four new combinations, Trichosanthes orientalis, Trichosanthes tubiflora, Trichosanthes scabra var. pectinata, Trichosanthes scabra var. penicaudii, and a clarified nomenclature of Trichosanthes costata and Trichosanthes scabra.

HTML

XML

PDF

]]>
Research Article Thu, 19 Apr 2012 00:00:00 +0300
Coccinia intermedia - a new Cucurbitaceae species from West Africa https://phytokeys.pensoft.net/article/1396/ PhytoKeys 7: 27-36

DOI: 10.3897/phytokeys.7.2032

Authors: Norbert Holstein, Susanne Renner

Abstract: Nuclear and plastid sequences from two individuals of a suspected new species of Coccinia from West Africa were added to an available molecular phylogeny for the remaining 27 species of the genus. Phylogenetic analyses of these data indicate the new species` monophyletic status and closest relatives. Based on four fertile collections, we here describe and illustrate Coccinia intermedia Holstein. We also provide a key to the Coccinia species of West Africa and map their distributions.

HTML

XML

PDF

]]>
Research Article Tue, 29 Nov 2011 00:00:00 +0200
A new Australian species of Luffa (Cucurbitaceae) and typification of two Australian Cucumis names, all based on specimens collected by Ferdinand Mueller in 1856 https://phytokeys.pensoft.net/article/1381/ PhytoKeys 5: 21-29

DOI: 10.3897/phytokeys.5.1395

Authors: Ian R. H. Telford, Hanno Schaefer, Werner Greuter, Susanne Renner

Abstract: As a result of his botanical explorations in northern Australia, Ferdinand von Mueller named several Cucurbitaceae that molecular data now show to be distinct, requiring their resurrection from unjustified synonymy. We here describe Luffa saccata F. Muell. ex I.Telford, validating a manuscript name listed under L. graveolens Roxb. since 1859, and we lectotypify Cucumis picrocarpus F. Muell. and C. jucundus F. Muell. The lectotype of the name C. picrocarpus is a sprig that is mounted on the same sheet as the lectotype of C. jucundus, a synonym of C. melo. We also illustrate the new species Luffa saccata. Cucumis picrocarpus is the sister species of the cultivated C. melo and was illustrated in a recent publication.

HTML

XML

PDF

]]>
Research Article Wed, 27 Jul 2011 00:00:00 +0300