梧桐科一些属的分类位置探讨

梧桐科（Ｓｔｅｒｃｕｌｉａｃｅａｅ）是锦葵目中的一个多型科，科的特征比较比样化。自从Ｅ．Ｐ．Ｖｅｎｔｅｎａｔ（１８３０）建立该科以来，对于该科范围和包含的属种数目，各国学者至今尚存在各种不同的看法。作者认为，火桐属（Ｅｒｙｔｈｒｏｐｓｉｓ）应当从梧桐属（Ｆｉｒｍｉａｎａ）中分出成为单独的属；午时花属（Ｐｅｎｔａｐｅｔｅｓ）不应归入锦葵科（Ｍａｌｖａｃｅａｅ），应当置于梧桐科；田麻属（Ｃｏｒｃｈｏｒ

COMMENTS ON THE TAXONOMIC POSITION OF SOME GENERA IN STERCULIACEAE

Sterculiaceae is a polytypic family with greatly diverse characteristics in Malvales. Till now many authors have no uniform agreement on the demarcation and the numbers of genera since E. P. Ventenat established this family in 1830. According to our studies, we agree that Erythopsis should be separated from Firmiana. Pentapetes should not be placed in Malvaceae, its characters are quite different from that of Malvaceae, so it is better to maintain it in the Sterculiaceae. On account of the pollen morphology and some other characters, Craigia is similar to that of some genera of Tiliaceae, and should be placed in Tiliaceae, but the flower and fruit characters of which are quite different from Excentrodendron and Burretiodendron, so we suggest establishing a new subfamily, namely Craigioideae S. J. Xu et Hsue subfam. nov. in the Tiliaceae to accommodate the Craigiae. Pentapetes, Corchoropsis, Paradombeya and Melhania should be placed in Sterculiaceae.