Pub Date : 1900-01-01DOI: 10.3767/blumea.2023.68.01.01
J. Beyer, H. Esser, M. Eurlings, P. V. Van Welzen
Croton (Euphorbiaceae) is a very large genus of over 1200 species of herbs, shrubs and trees occurring mainly in the (sub)tropics. The major diversity of Croton is within the Neotropics; and there are comparatively few species in South-East Asia. This contribution provides a revision of Croton from the Sumatran region in Indonesia, including descriptions and a determination key. In total sixteen species are recognized for Sumatra, including four species new to science, C. beccarii, C. scalaeus, C. simalurensis, and C. viridifolius. Two new synonyms and lectotypification of numerous names are also included. Besides a taxonomic treatment, a molecular analysis, using the nuclear ribosomal internal transcribed spacer (ITS), based on former data extended with Sumatran species, was performed to create a phylogeny that places the Sumatran species in a phylogenetic context. In total 13 new sequences were created, which were combined with 56 sequences obtained from GenBank. The results from the phylogenetic analysis, based on Bayesian inference, are in line with the phylogeny as published for mainly the Australian species of Croton by Van Ee et al. (2015).
Croton (Euphorbiaceae)是一个非常大的属，有超过1200种草本植物、灌木和乔木，主要分布在(亚)热带。巴豆的主要多样性在新热带地区;在东南亚的种类相对较少。这篇文章提供了来自印度尼西亚苏门答腊地区的Croton的修订，包括描述和确定密钥。苏门答腊共有16种，包括4种科学上的新种:C. beccarii、C. scalaeus、C. simalurensis和C. viridifolius。还包括两个新的同义词和众多名称的lectotypification。除了分类处理外，利用核糖体内部转录间隔(ITS)进行分子分析，基于苏门答腊物种的先前数据，进行了系统发育分析，将苏门答腊物种置于系统发育背景中。共创建了13个新序列，并与从GenBank中获得的56个序列进行了组合。基于贝叶斯推理的系统发育分析结果与Van Ee et al.(2015)发表的主要针对澳大利亚Croton物种的系统发育结果一致。
{"title":"A revision of the genus Croton (Euphorbiaceae) in Sumatra (Indonesia)","authors":"J. Beyer, H. Esser, M. Eurlings, P. V. Van Welzen","doi":"10.3767/blumea.2023.68.01.01","DOIUrl":"https://doi.org/10.3767/blumea.2023.68.01.01","url":null,"abstract":"\u0000 Croton (Euphorbiaceae) is a very large genus of over 1200 species of herbs, shrubs and trees occurring mainly in the (sub)tropics. The major diversity of Croton is within the Neotropics; and there are comparatively few species in South-East Asia. This contribution provides a revision of Croton from the Sumatran region in Indonesia, including descriptions and a determination key. In total sixteen species are recognized for Sumatra, including four species new to science, C. beccarii, C. scalaeus, C. simalurensis, and C. viridifolius. Two new synonyms and lectotypification of numerous names are also included. Besides a taxonomic treatment, a molecular analysis, using the nuclear ribosomal internal transcribed spacer (ITS), based on former data extended with Sumatran species, was performed to create a phylogeny that places the Sumatran species in a phylogenetic context. In total 13 new sequences were created, which were combined with 56 sequences obtained from GenBank. The results from the phylogenetic analysis, based on Bayesian inference, are in line with the phylogeny as published for mainly the Australian species of Croton by Van Ee et al. (2015).\u0000","PeriodicalId":232235,"journal":{"name":"Blumea - Biodiversity, Evolution and Biogeography of Plants","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132514222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3767/blumea.2022.67.02.06
A. P. Keim, W. Sujarwo, D. Sahroni
A new species of Freycinetia Gaudich. (Pandanaceae; Freycinetoideae) with conspicuous ellipsoid leaves and spiny auricles from the island of Halmahera in the Moluccan Archipelago is here newly described as F. halmaherensis A.P.Keim, W.Sujarwo & Sahroni. A full description of the new species and a key to the species of Freycinetia in the Moluccas are provided.
{"title":"A new species of Freycinetia Gaudich. (Pandanaceae; Freycinetoideae) from the island of Halmahera, the Moluccas, Indonesia","authors":"A. P. Keim, W. Sujarwo, D. Sahroni","doi":"10.3767/blumea.2022.67.02.06","DOIUrl":"https://doi.org/10.3767/blumea.2022.67.02.06","url":null,"abstract":"\u0000 A new species of Freycinetia Gaudich. (Pandanaceae; Freycinetoideae) with conspicuous ellipsoid leaves and spiny auricles from the island of Halmahera in the Moluccan Archipelago is here newly described as F. halmaherensis A.P.Keim, W.Sujarwo & Sahroni. A full description of the new species and a key to the species of Freycinetia in the Moluccas are provided.\u0000","PeriodicalId":232235,"journal":{"name":"Blumea - Biodiversity, Evolution and Biogeography of Plants","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123208356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3767/blumea.2022.67.01.06
P. V. Van Welzen, E. Winkel
Dalechampia is a mainly South American genus of generally climbing shrubs with usually sharp stiff trichomes in some of the inflorescence parts. The bisexual inflorescences are very condensed and subtended by two, often showy, large bracts. The three pistillate flowers are separate from the staminate subinflorescence (both groups with their own bracts). The staminate subinflorescence contains groups of staminodial-like bractlets that provide resin for female bees or fragrance for male bees. In west Malesia (Sumatra and Java) one indigenous species is found, the climbing D. bidentata, and occasionally cultivars of the subshrub D. spathulata.
{"title":"The Malesian species of Dalechampia (Euphorbiaceae)","authors":"P. V. Van Welzen, E. Winkel","doi":"10.3767/blumea.2022.67.01.06","DOIUrl":"https://doi.org/10.3767/blumea.2022.67.01.06","url":null,"abstract":"\u0000 Dalechampia is a mainly South American genus of generally climbing shrubs with usually sharp stiff trichomes in some of the inflorescence parts. The bisexual inflorescences are very condensed and subtended by two, often showy, large bracts. The three pistillate flowers are separate from the staminate subinflorescence (both groups with their own bracts). The staminate subinflorescence contains groups of staminodial-like bractlets that provide resin for female bees or fragrance for male bees. In west Malesia (Sumatra and Java) one indigenous species is found, the climbing D. bidentata, and occasionally cultivars of the subshrub D. spathulata.\u0000","PeriodicalId":232235,"journal":{"name":"Blumea - Biodiversity, Evolution and Biogeography of Plants","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123554677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3767/blumea.2021.66.03.06
S. Rahayu, M. Rodda
We describe a new Hoya species from Central Kalimantan, H. buntokensis, and a new subspecies of H. wallichii from West Kalimantan, Hoya wallichii subsp. tenebrosa. Hoya buntokensis is part of a group of four species that form specialised leaf structures harbouring ants (here defined as megadomatia), and it is most similar to H. undulata. Hoya buntokensis differs from H. undulata in lamina margin (flat vs undulate); shape of corona lobes outer processes (fan shaped vs elliptic), and in the pollinarium morphology (corpusculum larger than pollinia vs corpusculum smaller than pollinia). Both H. wallichii subsp. wallichii and H. wallichii subsp. tenebrosa are slender plants with ovate to oblong, thinly coriaceous glabrous leaves, slender peduncles with 1 or 2 flowers open at a time, and broadly campanulate corollas. Hoya wallichii subsp. tenebrosa differs from H. wallichii subsp. wallichii in corolla colour (dark purple with a paler edge vs white-cream), corona lobe shape and surface (broadly elliptic, spreading and with a minute inner process, almost black with a velvety surface vs kidney-shaped, erect and with a well-developed acuminate inner process, purple with a shiny surface).
{"title":"Hoya buntokensis (Apocynaceae, Asclepiadoideae), a new myrmecophytic species and Hoya wallichii subsp. tenebrosa, a new subspecies from Borneo (Kalimantan, Indonesia)","authors":"S. Rahayu, M. Rodda","doi":"10.3767/blumea.2021.66.03.06","DOIUrl":"https://doi.org/10.3767/blumea.2021.66.03.06","url":null,"abstract":"\u0000 We describe a new Hoya species from Central Kalimantan, H. buntokensis, and a new subspecies of H. wallichii from West Kalimantan, Hoya wallichii subsp. tenebrosa. Hoya buntokensis is part of a group of four species that form specialised leaf structures harbouring ants (here defined as megadomatia), and it is most similar to H. undulata. Hoya buntokensis differs from H. undulata in lamina margin (flat vs undulate); shape of corona lobes outer processes (fan shaped vs elliptic), and in the pollinarium morphology (corpusculum larger than pollinia vs corpusculum smaller than pollinia). Both H. wallichii subsp. wallichii and H. wallichii subsp. tenebrosa are slender plants with ovate to oblong, thinly coriaceous glabrous leaves, slender peduncles with 1 or 2 flowers open at a time, and broadly campanulate corollas. Hoya wallichii subsp. tenebrosa differs from H. wallichii subsp. wallichii in corolla colour (dark purple with a paler edge vs white-cream), corona lobe shape and surface (broadly elliptic, spreading and with a minute inner process, almost black with a velvety surface vs kidney-shaped, erect and with a well-developed acuminate inner process, purple with a shiny surface).\u0000","PeriodicalId":232235,"journal":{"name":"Blumea - Biodiversity, Evolution and Biogeography of Plants","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116778602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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