Integrative Biology Journals

Plant Diversity ›› 1981, Vol. 3 ›› Issue (01): 1-3.

• Articles •    

A PHYT0GEOGRAHIC STUDY ON SECT. OREADES 0F SEDUM FR0M XIZANG(TIBET)

Fu Kun-tsun   

  1. North-Western Institute of Botany,China
  • Online:1981-02-25 Published:1981-02-25

西藏山景天组植物的地理分布

傅坤俊   

  1. 西北植物研究所

Abstract: The present paper is mainly to discuss the geographic distribution of Sect. Oreades K. T. Fu from Tibet. The distributional centre of the Sect. Oreades plants is in the southwest of our country, i. e., the western part of Sichuan province, the northwestern part of Yunnan Province and the eastern part of the Tibetan Autonomous Region. And its disperses on all sides around.About 15 species and 1 variety, Which are resttictcd to the castern part of Tibetan Autonomous Region.

Key words: phtogeorahic, sect oreades, seddum, Tibet

摘要: 景天属(sedum L.)植物全球共400多种,主要分布于北半球,一部分产非洲和拉丁美洲。中国有124种,1亚种,14变种及1变型,分布几遍全国,分3个亚属。Ⅰ. 贡景天亚属(Subg. Balfouria)[8], 仅有1种,分布于藏东、滇西北和川西南;Ⅱ·星果亚属(Subg.edum),有35种,1亚种,5变种及1变型,分3个组:1.费菜组(Sect.Aizoon),叶通常无距;萼片无距,花序无苞片,花大,萼长5毫米以上;有8种2变种1变型,分布于长江流域及以北各省区,2.苞景天组Sect. Bracteata),叶有短距; 萼片无距;花序有叶状苞片,花小,萼长约1毫米。有5种,1亚种及2变种,分布于黄河流域以南各省区;3.佛甲草组(Sect.japonica) ,叶常有距; 萼片有距,常不等长。

关键词: 西藏, 山景天组, 分布