Taxonomic revision of the genus Wurdastom (Melastomataceae, Cyphostyleae)
Taxonomic revision of the genus Wurdastom (Melastomataceae, Cyphostyleae)
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Wurdastom 属（Melatomataceae、Cyphostyleae）的分类学修订
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Humberto Mendoza Cifuentes
中科院分区：
文献类型：
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作者：
Humberto Mendoza Cifuentes
背景和目的：Wurdastom是一个鲜为人知的新热带区属，这是在植物标本馆收藏很少代表。本文对该属的历史沿革、族位、分类学进行了综述，并对该属的每一种进行了保护性评价。哥伦比亚17个植物标本馆的Wurdastom标本（CAUP，COAH，COL，CUVC，FMB，HUQ，PSO，UDBC，UPTC，瓦莱），厄瓜多尔（QCA，QCNE）和美国（CAS，F，MO，NY，US）进行了审查，并查阅了JSTOR全球工厂的相关模式集。为每一物种编制了识别检索表、描述、插图和分布图。主要结果：在修订后的植物标本库中，总共发现了52个Wurdastom标本集。本文描述了产于哥伦比亚的一新种，并首次报道了来自瓦莱植物标本馆的新的同种型。Wurdastom是从哥伦比亚中西部到北方秘鲁的乔木和灌木的一个小属，它生长在安第斯山脉和潮湿的低地热带森林中。该属隶属于Cyphostyleae族，其特征为顶生脉序，营养部分和花序上具触须状毛，多花聚伞圆锥状或多聚伞圆锥状花序，单雄蕊花，花瓣≤ 1cm，子房下位，果实为蒴果。一个物种在这里被评估为受威胁（W。sneidernii），two as Vulnerable（W. cuatrecasasii，宽叶草W. dudleyi），其余的被视为数据不足。
Background and Aims: Wurdastom is a little-known neotropical genus, which is poorly represented in herbarium collections. A historical summary,discussion about the tribal position, taxonomic review, and a conservation assessment of each species of the genus was carried out.Methods: Wurdastom specimens of 17 herbarium collections from Colombia (CAUP, COAH, COL, CUVC, FMB, HUQ, PSO, UDBC, UPTC, VALLE), Ecuador (QCA, QCNE), and the United States of America (CAS, F, MO, NY, US) were reviewed, and relevant type collections available at JSTOR Global Plants were consulted. An identification key, descriptions, illustrations and distribution maps for each species were developed. IUCN guidelines and criterio were used for conservation assessments of each species.Key results: In total, 52 Wurdastom collections were found in the revised herbaria. A new species from Colombia is described and new isotypes from the VALLE Herbarium are reported here for the first time. Wurdastom is a small genus of trees and shrubs from central-west Colombia to northern Peru where it grows in Andean and humid lowland tropical forests. The genus, which is assigned to the tribe Cyphostyleae, is characterized by the acrodromous venation, barbellate trichomes on vegetative parts and inflorescences, multiflorous thyrsoid or pleiothyrsoid inflorescence, haplostemonousflowers, petals ≤1 cm long, inferior ovaries, and capsular fruits.Conclusions: Wurdastom includes eight neotropical species, most of them with restricted distributions. One species is assessed here as Threatened (W. sneidernii), two as Vulnerable (W. cuatrecasasii, W. dudleyi), and the rest are treated as Data Deficient.