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四川牻牛儿苗科(Geraniaceae)植物地理分布的研究
引用本文:谭仲明.四川牻牛儿苗科(Geraniaceae)植物地理分布的研究[J].植物研究,1995(4).
作者姓名:谭仲明
作者单位:四川大学生物系
摘    要:四川牛儿苗科植物共3属、53种、2变种,其中老鹳草属Geranium49种,2变种,牛儿苗属Erodium2种,熏倒牛属Biebersteinia2种。属的分布区类型分别为世界分布,地中海区至温带、热带亚洲、大洋洲至南美洲间断分布和地中海区、西亚至中亚分布。研究了本科植物在四川的水平分布和垂直分布情况。水平分布方面,在东部四川盆地及盆周山地分布着老鹳属1属、23种、2变种,占四川本科种数的43%。在西部,川西南河谷山原地区分布着老鹳草属植物32种,占四川儿苗科植物总数的60%,是四川老鹳草属植物分布最集中的地区。在川西北随着地理纬度的升高,属的数目逐渐增加,到最北面,3属均产,但老鹳草属植物的种类则逐渐减少。垂直分布方面,Ⅰ.川东盆地及川西南山地常绿阔叶林地带有老鹳草属1属、44种、2变种,占四川牛儿苗科植物总数83%,主要分布在川西南河谷山原植被地区。Ⅱ.川西高山峡谷山原针叶林地带,分布着老鹳草属和牛儿苗属植物25种,占四川本科植物的47%,主要分布在川西高山峡谷区。Ⅲ.四川北高山灌丛、草甸地带,分布着老鹳草属、牛儿苗属和熏倒牛属植物12种。熏倒个属在四川仅分布在这一地带内。

关 键 词:牻牛儿苗科,地理分布,四川

STUDY ON THE GEOGRPHIC DISTRIBUTION OF GERANIACEAE PLANTS IN SICHUAN
Tan Zhong-Ming.STUDY ON THE GEOGRPHIC DISTRIBUTION OF GERANIACEAE PLANTS IN SICHUAN[J].Bulletin of Botanical Research,1995(4).
Authors:Tan Zhong-Ming
Abstract:There are 53 species and 2 varieties of Geraniaceae plants in Sichuan. Theybelong to 3 genera, which are Geranium (49 species and 2 varieties), Erodium (2species)and Biebersteinia (2 species). The genus areal-types of these genera areCosmopolitan (Geranium ), Mediterranea to Temp. and Trop. Asia, Austriiasia & S.Amer. disjuncted (Erodium) and Mediterranea, West Asia to Central Asia(Biebersteinia). The horizontal and vertical distributions of these species in Sichuanhave been studied. Only 23 species of one genus (Geranium) distribute in the eastof and around Sichuan Basin. They account for 43% of the total species of Geraniaceae in Sichuan. 32 species of Geranium, which account for 60% of the total numberof Geraniaceae species, distribute in the southwest mountainous area where theGeraniaceae species are concentrated. In the northwest of Sichuan, the generanumber increases along with the increase of latitude. All three genera are distributedhere. But the number of species of Geranium decreases. In the view of verticaldistribution, the following results have been revealed: (1) 44 species and 2 varietiesof Geranium distribute in the evergreen broadleaf forest zone in the east of SichuanBasin and southwest mountainous area. They account for 83% of the total speciesof Geraniaceae in Sichuan and most of them distribute in the southwest mountainous valley vegetation area. (2)There are 25 species of Geranium and Erodiumdistributed in the mountainous and valley conifer zone in the west of Sichuan.They account for 47% of the total family in Sichuan. (3) 12 species of Geranium.Erodium and Biebersteinia are distributed in the mountainous shrubs and meadowsin the northtvest of Sichuan, which is the only area in Sichuan where Biebersteinia plants grow.
Keywords:Geraniaceae  Geographic distribution  Sichuan
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