中国产瓦韦属植物叶柄与根状茎的比较解剖研究

详细观察了已发表的60种瓦韦属植物叶柄和根状茎的横切面。瓦韦属植物叶柄维管束条数最多7条,最少2条,其中2个较粗,其余较细,排成一字型、三角型、四角型、半轮型等。根状茎上的维管束条数最少5条,最多16条,属于网状中柱,维管束不规则环形排列,夏绿种类厚壁组织较少或没有,常绿种类厚壁组织较多。叶柄与根状茎的研究对瓦韦属组的划分和种的确立有重要的参考价值。参考这些特征,瓦韦属相应地划分成六个组,即:大叶瓦韦组、扭瓦韦组、瓦韦组、革质叶瓦韦组、纸质叶瓦韦组、网眼瓦韦组。一些种类相应地进行了合并。

COMPARATIVE ANATOMY ON THE STIPES AND RHIZOMES OF THE FERN GENUS LEPISORUS

The stipes and rhizomes of Lepisorus including 60 species are investigated. Their transections are observed. The most number of the stipes is 7. The least number of stipes is 2. Acording to the number and form of the vascular bundles, they are divided into 4 types. From the base of stipes to the top,vascular bundles gradually combine, and number gradually reduce. The rhizome sclerenchyma of summer green species is less than that of evergreen species. The rhizome is dictyostelis,with a number of meristeles, varing from 5 to 16. Each meristeles has platelike xylem, surrounded by the phloem. The genus is divided 6 sections. They are Sect. Macrophyton, Sect. Thunbergianus, Sect. Contortus, Sect. chartoceophyton, Sect. Hymenophyton, Sect. Coriacephyton.