云雾算盘子(叶下珠科)分类小记

Taxonomic Notes on Glochidion nubigenum (Phyllanthaceae)

摘要:

云雾算盘子（Glochidion nubigenum Hook.f.）于1988年被描述为中国分布新记录种，但同时所引证的凭证标本（李渤生、程树志4533；采于西藏墨脱）实际属于米什米算盘子（G.mishmiense Hook.f.），而《中国植物志》及Flora of China等分类学著作中关于云雾算盘子的形态特征描述与上述凭证标本及云雾算盘子原始形态描述均不符，因此前人关于云雾算盘子在中国的分布记录属于标本鉴定错误所致。近期在西藏日喀则市亚东县的野外考察中发现了真正的云雾算盘子野生居群，证实中国确实有该种分布，故对该种在中国的地理分布区信息予以修正，并提供了该种详细的形态特征描述与野外活体图片。

Abstract:

Glochidion nubigenum Hook. f. was described as a newly recorded species to China in 1988, however the voucher specimen (B.S. Li & S.Z. Chen 4533; collected in Motuo County, China) cited then was misidentified and it actually belongs to G. mishmiense Hook. f. In addition, the morphological description of G. nubigenum provided in both Flora Republica Popularis Sinicae and Flora of China also conflicted with the morphology of the voucher specimen mentioned above and also the actual G. nubigenum, thus it is evident that the distribution of G. nubigenum in China as recorded previously seems to be questionable. Recently, during a field investigation conducted in Yadong County, Tibet, China, a wild population of the actual G. nubigenum was discovered. Thus the information about the distribution of G. nubigenum in China is revised and detailed morphological description as well as the field images of the species are provided here.