摘要
对毛茛科Ranunculaceae铁线莲属Clematis的大叶铁线莲组sect.Tubulosae进行了修订,确定此组含9种2变种和3变型,对此组的分类简史和地理分布做了介绍,研究了此属大多数种的花粉形态,写出此组组下分类群的形态特征、地理分布等,并附有全部种的插图。此组9种被划分为2亚组,其中原始群羽叶铁线莲亚组subsect.Pinnatae(有2种,1种分布于中国河北和东北,另1种产日本)在木质藤本习性、花构造、花粉形态(具3沟)等方面与威灵仙组sect.Clematis颇为近似,区别主要在于萼片在开放初期近直立,以后平展,雄蕊花丝被毛,此亚组可能源于威灵仙组。进化群大叶铁线莲亚组subsect.Tubulosae(有7种,分布于我国东部、北部和台湾,朝鲜和日本)为直立多年生草本、小亚灌木或小灌木,花通常杂性,萼片直立(花萼呈筒状,稀呈坛状),顶端或上部反曲,雄蕊常有毛,花粉通常具散孔,只在1种(原始种大叶铁线莲C.heracleifolia)具3沟,此亚组可能由羽叶铁线莲亚组演化而来。
Clematis sect. Tubulosae is revised in this paper. Nine species, two varieties, and three forms are recognized and classified into two subsections. An identification key is provided, and each species is described and illustrated. Brief taxonomic history is given, along with a summary of pollen morphology and geographical distribution. The relationships among the infrasectional groups are also discussed： Subsect. Pinnatae, characterized by its scandent habit, bisexual flowers, white or pinkish, at length spreading, obovate-oblong sepals, and tricolpate pollen, is regarded as the more primitive group, whereas subsect. Tubulosae, characterized by its erect habit, usually polygamous flowers, blue or purple, erect, usually narrowly oblong sepals, and usually pantoporate pollen, is regarded as the more advanced group of the section. Subsect. Pinnatae is believed to have originated from sect. Clematis in Central or East China, and subsect. Tubulosae might be derived from subsect. Pinnatae.
出处
《植物分类学报》
CSCD
北大核心
2007年第4期425-457,共33页
Acta Phytotaxonomica Sinica
基金
Supported by the National Natural Science Foundation of China, Grant No. 30470126.
