四川百里峡省级自然保护区植物资源调查研究

为进一步掌握四川百里峡省级自然保护区植物资源的现状,对保护区植物资源进行调查,结果表明:自然保护区共有野生维管植物150科,682属,1 429种.其中蕨类植物22科,44属,74种;裸子植物8科,17属,24种;被子植物120科,625属,1 319种.维管植物科数占四川省的64.66%,全国的41.21%;属数占四川省的42.32%,全国的20.20%;种数占四川省的15.32%,全国的4.88%.保护区有国家Ⅰ级保护植物7种,国家Ⅱ级保护植物13种,此外还有现被列为世界级极危植物—崖柏.种子植物区系共有15个类型和18个变型.植物区系温带性质明显,热带成分也占一定的比例,具有温带向热带过渡的特征.植物区系具有一定的古老性.保护区植被划分为3个植被型组,8个植被型,24个群系.

Study on plant resource of bailixia provincial nature reserve in Sichuan

In order to further grasp the present situation of plant resources of Bailixia provincial nature reserve in Sichuan ,the plant resources of nature reserve w ere investigated . The results showed that ,there were 1 429 species of wild vascular plants belonging to 682 genera and 150 families in nature reserve ,among them ,there are 74 species pteridophyte belonging to 44 genus and 22 families ,24 species gymnosperm belonging to 17 genus and 8 families ,1 319 species angiosperm belonging to 625 genus and 120 families .T he quantity of vascular plants families account for 64.66% of Sichuan ,w hich account for 41.21% of China . The quantity of vascular plants genera account for 42.32% of Sichuan ,which account for 20.20% of China .The quantity of vascular plants species account for 15.32% of Sichuan , w hich account for 4.88% of China .T here are 7 kinds of national first class protected plants and 13 kinds of national second class protected plants in nature reserve ,in addition , T huj a sutchnenensis which is now listed as a critically endangered species in the world was found . The seed plant flora consists of 15 areal‐types and 18 sub‐types .The flora of seed plant showed an obvious feature of temperate ,tropical elements also accounted for a certain proportion ,which has the transition characteristics from temperate to tropic .The flora are of antiquity to some extentand . The vegetation of the nature reserve is divided into 3 vegetation type groups ,8 vegetation types and 24 formations .