羊蹄甲属的系统与生物地理学：1．厚盘组的分支分析

羊蹄甲属厚盘组作为一个分类实体包含有约１８个种，本组植物主要分布于中国南部及中南半岛等地，其中很多种类在其分布区内地理替代现象相当明显。对此组的分支系统学研究，一方面有助于对本组种类系统进化关系的理解，另一方面又为对热带亚热带亚洲大陆各区系之间关系。的理解提供帮助，为本地区的分支生物地理学研究提供材料．本文用３０个形态及叶脉脉序性状对厚盘组进行了分支分析．云南羊蹄甲被选作外类群，内类。群包括龙须藤亚组及攀援羊蹄甲亚组的所有１８个种。分析产生了８个最简约的分支图。分析还表明攀援羊蹄甲单独作为一个亚组是不可取的，厚盘组的分类及生物地理学需要进一步的研究．

Systematics and biogeography of Bauhinia L.(Leguminosae-Caesalpinioideae): I. Cladistic analysis of sect. Lasiobema (Korth. ) Benth.

A cladistic analysis of sect. Lasiobema based on 30 morphological and leafyenational characters is presented. Bauhinia yunnanensis Franch. chosen as its outgroup. All 18 species in subsect. Scandentes and subsect. Championae are included.Eight equally most parsbouious cladograms are produced. Some clades, the (B.comoso, B. esquirolii ) clade, the (B. scandens, B. delavayi ), (B. flava, (B. oxysepala,B. penicilloba)) ) clade, the (B. concreta, B. curtissii ) clade, the (B. hormsiana, (B.colycina, B. godlroyi) ) clade, ate stable in all cladograms produced. The subsectionalstatus of B. sccondens is not warranted. Further studying is needed to make moredetailed account on the systematics and biogeography of sect. Losiobema.