摘要
九寨沟种子植物(按恩格勒系统)已鉴定的植物有88科299属744种,其中裸子植物4科10属27种,被子植物84科289属717种.从生长型来看,乔木81种,灌木141种,藤木37种,草本485种.属的系数41.7.区系分区属泛北极植物区,中国-喜马拉雅森林植物亚区,横断山脉地区.属分布区类型温带215属,占83.65%;热带分布27属,占10.51%.地中海成分8属,占3.12%;全世界分布42属.国家重点保护的珍稀濒危植物7种.植被组成中以冷杉、云杉、松等属的植物为优势种,阔叶树的优势种是杨柳科、桦木科、椴树科等.主要灌木有茶藨子、蔷薇、枸子、悬钧子、花揪、忍冬、杜鹃等植物.草本以菊科、禾本科、莎草科、毛茛科等植物为主.
The seed plants in Jiuzhaigou identified belong to 98 families, 299 genera, 744 species, according to A. Engler classification system Among them, 4 families. 10 genera, 27 species arc gymnspcrm, 84 families, 289 genera, 717 species arc angiosperm Considering growing type, there are 81 species of arber, 141 species of shrub. 37 species of liana, 48 species of herb. The coefficient of genu is 41.7. They are of the Holactic Kingdom, sino-Himalayan forest sub-Kingdom, and transversal mountain range region. On the distribution pattern of genu. there are 215 genera belonging to temperate. 27 genera belonging to tropic, 10.5% and 3.8% separately, 42 gcnura distribute to all the world. Among the species, there are many rare and precious plants potected by the country, they are Picea aurantiaca, Picea brachyiyla, Euplelea pletospermum, Syringa pinnatifolia, Kingdonia uniflora and Crieaeaster agrestis. The major dominant elements in arborous layer of vegetation are gymnosperm, such as Abies, Picea, Pinus, Sabina, etc. The major dominant species of broad-leaf forests are Salicaceac, Betulaceae, Acerceae, Tiliaceae, etc. The major species of shrub are Berberisi Ribes, Rosa, Cotoneaster, Rubus, Sorbus, Lomcera, Rhododendron, etc The major speoies of herb arc Compositae, Gramineae, Cyperacae, Ranunculaceae, Orchidaccae, Gentianaceae,etc.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
1991年第4期471-478,共8页
Journal of Southwest China Normal University(Natural Science Edition)
基金
国家自然科学基金资助项目
