新疆繁缕亚科和裸果木亚科植物地理分布和区系特点的研究

新疆石竹科的繁缕亚科、裸果木亚科共有植物１４属６３种３变种。占新疆石竹总属数６６．７％总种数４８．２％。从垂直分布来看，主要分布于阿尔泰山和天山的亚高山草甸带和森林草甸带，昆仑山的高寒荒漠草原也有一定的分布。从水平分布看，主要有五个分布较集中的区域，即：阿尔泰泰山地，准噶尔西部山地，天山中西部山地、天山东部山地、昆仑山和帕米尔高原。在区系组成中，北温带成分２１种，占３１．９％；温带亚洲成分１４种，

STUDY ON GEOGRAPHICAL DISTRIBUTION AND FLORA CHARACTERISTIC OF SUBFAMILIES ALSINOIDEAE AND PARONYCHIOIDEAE IN XINJIANG

There are about 14 genera with 63 species and 3 verities of subfamilies Alsnoideae andParonychioideae in Xinjiang. They are 66.7% in total genera and 48.2% in total species ofCaryophyllaceae in Xinjiang.On vertical distribution,plant of Alsinoideae and Parony-chioideae mainly distribut subapine meadow and conisilvae in Tianshan Mountains and AltaiMountains,some species are distributed in high mountains wasteland in Kunluin,On leveldistribution,there arc five regions of more species distribution,such as Altai Mountain Re- gin,West Mountain Regin of Jungger,Centre west Tianshan Mountain Regin,East Tian-shan Mountains Regin,Kunlun Mountains Regin and Pamir plateau;In these elements ofalsinoideae and Paronychioideae,the North Temperate one element is 21 species(31.9%),Asia element in emperate Zone is 14 species(21.1%),Centre Asia element is 10(15.1%),Centre Asia-Himalaya element is 4 species(6%),The Mediterranean-West Asia-CentreAsia element is 4 species(6%),Endemic element is 6 species(9%).There fore it showsthat the flora of these two subfamilies in Xinjiang is mainly the Temperate Zone element.Inaddition,these two subfamilies plants have some function in the vegetation of Xinjiang.They are common species in conisilvae,some species are essential species in wastlant plant,some species have an important economical value.So these resources will be utilized fully infuture.