摘要
二、广西特有植物区系的特征和地理分布 (一)广西特有植物的科、属、种构成 就迄今我们收集到的资料,广西有维管束植物7217种(包括种下等级),隶属于288科,1778属。
Counting up recently the total numbers of Guangxi flora, there are 7217 taxa including 6602 species, 23 subspecies, 541 varieties and 51 forms pertaining to 1778 genera of 283 families. Among them, there are 10 endemic genera, they are: Sinia (1 sp. ) , Heteroplcxis (2 sp. ) , Metebtiggsia (2 sp. ) , Gyrogyne ( 1 sp. ) , Buxiphyllum ( 1 sp. ) , Allostigma ( 1 sp. ) , Schistolobos (1 sp. ) , Dolicholoma ( 1 sp. ) , Dayaoshania ( 1 sp. ) , and Pseudochirita ( 1 sp. ) , and there are 905 endemic taxa (including 744 endemic taxa and 161 quasi-endemic taxa ) holding 12.5% of the total numbers of Guangxi flora.Among the 905 endemic taxa, there are 382 in the north tropical region, 298 in the south subtropical region. 210 in 1 ho middle subtropical region, and 15 sine locality. Above statistics show that the regional distribution of Guangxi endemic plants is in accordance with the regional distribution of Guangxi flora, that is, the plant zonal character of Guangxi belongs to the tropical-subtropical. The distribution of Guangxi endemic plants is uneven. According to the density of distribution of endemic plants, there are five centres of geographical distribution in Guangxi, that is, 1 ) the southwest ( 336 taxa ) , belonging to a subregion of the Tonkin Gulf region, 2) the South (46 taxa ) , belonging to the Tonkin Gulf region, 3) the centre and east ( 159 taxa ) , belonging to the South China region, 4 ) the north and northeast ( 210 taxa ) , mainly belonging to the Central China region, 5 ) the west and northwest ( 139 taxa ) , belonging to the "Dian-pian-gui" region.Based upon our statistics and analysis, some fundamental characteristics of flora of Guangxi endemic plants can be summarized as follows:1 ) Guangxi endemic plants are very rich and have an ancient origin, but most of them are recently formed neo-endemic plants.2 ) Floristic elements are complex and varied.3 ) The specialization of the limestone hill is conspicuous.The relations of flora of Guangxi endemic plants to the neighboring floras are described and discussed in this paper and the list of the Guangxi endemic plants is included also in it.
出处
《广西植物》
CAS
CSCD
北大核心
1989年第3期201-210,共10页
Guihaia
