摘要
木林子自然保护区具有丰富的种子植物,现已知种子植物134科、488属、约1043种(包括亚种和变种)。从木林子种子埴物134科的地理分布统计和488属所归属的15个分布区类型的比较分析中,可以看出木林子种子植物区系明(?)具有温带性质并含有丰富的热带成分。温带分布科、属分别占木林子区系总科、属数(不包括世界分布科、属)的51.09%和63.45%,热带分布科、属则为48.91%和31.16%,根据本区系在世界、中国和湖北种子植物区系中种数百分比的比较分析,确认桦木科(Betulaceae)、山茱萸科(Cornaceae)等15科为木林子区系组成上的优势科。木林子种子植物区系中有众多的古老或原始的科属,在东亚分布科和中国特有属中尤为明显,值得特别注意的是本区系中仅分布于川东——鄂西或以川东——鄂西为分布中心的种数多达131种,占全部种数的12.55%,表现出强烈的种系发生和分化的地域性特征,建议在中国植物区系华中地区内划分川东——鄂西亚地区。
Mulinzi in W. Hubei is a natrue sanctuary rich in spermataphyte flora. It is now known by the study that there are 1043 species of 488 genera among 134 families (including subspecies and varieties, the same below). On the basis of the geographic distributional statistics of 134 families and the comparative analysis of 488 genera belonging to 15 distribution-types in Mulinzi flora, the author proflers that the spermatophyte flora of Mulinzi is obviously a temperate one but with abundant tropical elements. The temperate distributional families and genera are respectively 51.09% and 63.45% of the total(excluding those cosmopolitan families and genera, the same below) in Mulinzi, while the tropical distributional families and genera being 48.91% and 31.16% respectively, According to the comparative analysis of the Mulinzi flora which is percentages of species in World, China and Hubei flora, it is obvious that 15 families such as Betulaceae, Cornaceae etc. are the dominant families of the flora. There are a lot of ancient genera and families in the Mulinzi flora, especialy in the distributional families of E. Asian and Chinese endemic genera. Th(?) are 25 chinese endemic genera in which the archaic and new endemic genera are coexisting in the flore.. There are 131 species being distributed mainly or only over E. Sichuan-w. Hubei. They are 12.55% of total species of the flora. It is a strong tendency to differentiations and occurrences of species types. therefore author suggests that the E. Sichun-w. Hubei subregion is separated from Central China region in China flora.
出处
《华中师范大学学报（自然科学版）》
CAS
CSCD
1990年第1期61-69,共9页
Journal of Central China Normal University：Natural Sciences
