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A Revision of the Genus Spenceria Trimen (Rosaceae)

机译:修订Spenceria Trimen(蔷薇科)

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摘要

The monotypic genus Spenceria Trimen (Rosaceae) is fully revised. Spenceria parviflora Stapf is regarded as a variety of S. ramalana Trimen. Descriptions of the genus, species and variety, a distribution map, line drawings of floral organs, pollen grains, chromosome numbers, and specimens examined of the two varieties are given. Spenceria (Rosaceae) is a monotypic genus comprising S. ramalana that occurs in alpine and subalpine grasslands in the Sino-Himalayan region. Trimen (1879) established the genus when he described S. ramalana from a single collection made at La-Ma-La, SW. Sichuan by R. E. Gill. Trimen's description, however, was incomplete due to the fragmentary nature of the specimen, which had only a flowering stem with a few flowers and noradical leaves. Franchet (1890) supplemented the description from specimens collected by Delavay in Yunnan. Although Stapf (1923) described S. parviflora which is smaller than S. ramalana and has smaller flowers, from E. Bhutan, it has generally been treated as a variety or as a synonym of S. ramalana (Kitamura 1954, Yu and Li 1985, Yu et al. 1985, Ku 1993).
机译:单型Spenceria Trimen(蔷薇科)已被完全修订。 Spenceria parviflora Stapf被认为是拉美链球菌Trimen的一种。给出了两个品种的属,种类和品种的描述,分布图,花器官的线条图,花粉粒,染色体数以及检查的标本。 Spenceria(蔷薇科)是由S. ramalana组成的单型属,存在于中喜马拉雅地区的高山和亚高山草原。特里曼(Trimen)(1879)从西南拉马德拉的一个藏品中描述了拉马链霉菌时,便确立了这个属。 R. E. Gill着,四川。然而,由于标本的碎片性,特里曼的描述是不完整的,标本只有一个开花的茎,上面有几朵花和没有叶的叶子。弗兰谢特(Franchet(1890))补充了Delavay在云南收集的标本中的描述。尽管Stapf(1923)曾描述过一种比小拉美拉花更小,花朵更小的小花欧拉小花,但它通常被当作不丹拉美拉花的变种或同义词(Kitamura 1954; Yu and Li 1985)。 ,Yu等,1985,Ku 1993)。

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