2005•Ganhanqu ziyuan yu huanjingRequires access
Study on Genera Flora of Seed Plants in Qilianshan Mountain Nature Reserve,China
Jian Liu
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Abstract
The Qilianshan Mountain Nature Reserveis situated south-western Gansu,China,and between latitude 36°45′—39°30′N,and longitude 93°31′—102°40′E,in north slope of Qilianshan Mountains and in the region that connect Qinghai-Tibet Plateau and Loess Plateau,Mongolia Plateau.There are 1286 species of seed plants that belong to 84 families and 431 genera in this region,and respectively have 30.43% of total families,and of 13.86% of total genera and 5.00% of total species of Chinese seed plants.There are 6 that over 20 species and 19 genera contain 10-19species and 45 genera contain 5-9 species and 360 genera contain 1-4 species,thereinto 217 genera contain 1 species.The floraof generacan be divided into 12 distribution typesand 18subtypes.There are 3 distribution typesand 1subtypes,27 genera,44 species belong to tropics distribution,6.26% of total genera;and 173 genera belong to north temperate distribution types and subtypes,40.14% of total genera,thereinto,126 genera belong to north temperate distribution types,29.23% of total genera are maximaldistribution types;and 64 genera belong to old world temperate distribution types and subtypes,thereinto,RoegneriaC.Coch.is maximalgenera,with total 15 species;and 34 genera belong to Mediterranea,W.Asia to C.Asia distribution types and subtypes,they have small genera of 1-5 species;24 genera belong to C.Asia distribution types and subtypes in them 11 genera contain 1 species;9 genera with 10 species belong to endemic to Chian,includeQinghai-Tibet Plateauand Tangute region endemic genera(Xanthopappus C.Winkl.and CoelonemaMaxim.),and most of them are mutual with around region and lack local endemic genera in the Qilianshan Mountain Nature Reserve.The temperate elements of genera are dominate obviously,the flora elements are younger,most of the plants are perennial herbs and poorest of trees;It has only a few of endemic genera and species;the geography elements are differenct according to altitude.