中文摘要：

对陕西黄龙山褐马鸡自然保护区种子植物区系进行了统计分析,结果表明,种子植物种类较丰富,共有种子植物96科、392属、729种.种子植物区系优势科较多,优势属贫乏.主要的优势科有菊科、禾本科、蔷薇科、豆科、毛茛科、百合科、唇形科等;单型属较少,少型属较丰富,且以草本植物为主;中国特有科、属贫乏.无中国特有科,仅有4个中国特有属.地理成分较复杂和多样,科的地理成分有7个分布型,属级的地理成分有15个分布型,科的地理成分以热带分布最多,占本区总科数的55.9%,热带分布的科中以泛热带成分为主,属级的地理成分以温带分布居首位,占本区总属数的77.4%,其中以北温带成分为主.植物区系温带性质显著,区系起源古老,并兼有一定的年轻成分.

英文摘要：

Seed flora in Huanglong Mountains Crossoptilon mantchuricum Nature Reserve of Shaanxi were studied based on the investigating and statistical analysis. The result shows that it is comparatively rich in species,there are 96 families, 392 genera, 729 species （including infraspecific taxa） totally among which ominant families are comparatively rich, and dominant genera are poor. For example, dominant families have Compositae, Gramineae, Rosaceae, Leguminosae, Ranunculaceae, Liliaceae, Labiatae, etc. The monogenus is poor,and the genera including 2-5 species is comparatively rich, and many are herb. In addition ,four genera belong to endemic to China. The geographical elements of the flora are comparatively complex and varied,the geographical elements of families have 7 areal types and areal subtypes,and the geographical elements of genera have 15 areal types and areal subtypes, among which the genera of temperate are the dominant areal types. The flora is ancient origin,but also younger elements.