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Studies in Neotropical Araliaceae. Three new species of Sciodaphyllum P. Browne (Araliaceae) with globose capitate inflorescences from Ecuador and Peru
Brittonia ( IF 0.6 ) Pub Date : 2021-05-04 , DOI: 10.1007/s12228-021-09661-0
Carlos Rodrigues-Vaz , Gregory M. Plunkett , Porter P. Lowry II

In the genus Sciodaphyllum (Araliaceae), some species have paniculate inflorescences with globose capitula as their terminal units, in which numerous tightly packed flowers develop into fruits that are appressed to each other. This informal assemblage, referred to as the “globose-capitate group,” currently includes 20 described species. Three new species with this distinctive morphology are described and illustrated with photographs of plants in the field or scans of herbarium specimens: S. basiorevolutum from northern Ecuador at the border of Carchi and Sucumbíos provinces; S. chachapoyense from the department of Amazonas, Peru, known only from the province of Chachapoyas; and S. rufilanceolatum from the province of Carchi, Ecuador, north of Maldonado along the border with Colombia, and in the Cerro Golondrinas. For each new species, a distribution map and a preliminary risk of extinction assessment (following the IUCN Red List criteria) are provided; S. basiorevolutum is assessed as Vulnerable, whereas S. chachapoyense and S. rufilanceolatum are both considered to be Endangered.



中文翻译:

新热带金莲花科的研究。厄瓜多尔和秘鲁的头状花序球状花序的三个新种Sciodaphyllum P. Browne(Araliaceae)

Sciodaphyllum(Araliaceae)属中,有些物种的圆锥状花序以球状头状花序作为终末单位,其中许多紧密堆积的花发育成互相紧贴的果实。这个非正式的组合,被称为“全球首屈一指的群体”,目前包括20个所描述的物种。描述了三种具有这种独特形态的新物种,并在野外的植物照片或标本室标本的扫描插图中进行了说明:来自厄瓜多尔北部的卡希和苏克姆比斯省交界处的巴西乳杆菌S. basiorevolutum);来自秘鲁亚马孙州的沙门氏菌S. chachapoyense),仅以沙恰波亚斯省为人所知;和红景天来自厄瓜多尔的卡奇省,马尔多纳多以北,与哥伦比亚接壤,以及塞罗·哥隆德里纳斯(Cerro Golondrinas)。提供了每个新物种的分布图和初步灭绝风险评估(遵循世界自然保护联盟红色名录标准);巴氏链球菌被认为是易感染的,而chachapoyenserufilanceolatum链球菌都被认为是濒临灭绝的。

更新日期:2021-05-05
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