中国西南地区杨属的分类学研究(Ⅰ)

TAXONOMIC STUDIES ON POPULUS L. IN SOUTHWESTERN CHINA (Ⅰ)

本文包括:康定杨的补充记载,4个新组合,16个新异名,2个天然杂种,2个分布新记录,2个新变种。

In this paper, the additional description of populus kangdingensis is presented, four nomenclatural new combinations ( i. e. P. kangdin- gensis var.lancifolia, P.kangdingensis var. schneideri, P.kangdingensis var. tibetica and P. pseudoglauca var. weixi )are made, sixteen scientific names in literature (i.e. P. adenopoda f. microcarpa, P. adenopoda var. platyphylla, P.bonatii, P.haoana, P.haoana var.megaphylla, P. haoana var.microcarpa,P.mainlingensis, P.purdomii var.rockii, P. qamdoensis, P.rotundifolia var.bonatii, P.schneideri, P. schneideri var. tibetica, P. yatungensis,P, yatungensis var. crenata,P. yatungensis var. trichorachis and P. yunnanensis var. pedicellata)are treated as new synonyms,two species (i.e.P.xiangchengensis and P. yuana)are considered to be natural hybrids, two species(i.e. P.purdomii and P.rotundifolia) are recorded respectively in Yunnan-Xizang region and Sichuan-Yunnan region for the first time and two varieties (i. e. P. lasiocarpa var. psiloclada and P. lasiocarpa var. yiliangensis )are described as new in this area.