湖北蕨类植物区系基本成分和主要特点的探讨

在湖北蕨类植物区系中,属种数量最多的科有水龙骨科(Polypodiaceae)、鳞毛蕨科(Dryopteridaceae)和蹄盖蕨科(Athyriaceae)。并以鳞毛蕨属(Dryopteris)、耳蕨属(Polystichum)和蹄盖蕨属(Athyrium)为最主要代表。区系的主要特点为:种类丰富,地理成分错综复杂,联系广泛,显示出多种区系成分交叉在一起的过渡特色。

RESEARCH ON THE BASIC ELEMENTS AND MAIN FEATURES OF PTERIDOPHYTES FLORA IN HUBEI PROVINCE

In this paper three topics have been discussed as follows:1. The basic elements of floraThe Polypodiaceae, Dryopteridaceae and Athyriaceae are most important and about 19.4%, 18.8%, 15% of the total number of species respectively. They constitute the main part of the flora and the Polystichum, Dryopteris and Athyrium are chief representatives.2. The main features of floraa. Constituency species of flora are richHubei is a province rich in Pteridophytes flora. Up to date, there are 41 families 97 genera 353 species that have been identified by the author and are reported in present paper.b. Geographical element of flora are more complexThe Hubei Pteridophytes flora not only includes predominant subtropical elements, but also tropical and temperate elements.3. Relationships of the Hubei pteridophytes flora with the flora of neighboring province and Japan.We find that the constitution of Hubei pteridophytes is similar to those of Southwest China, East China and Japan.