Pteridaceae

鳳尾蕨科

PPG

Pteridaceae 鳳尾蕨科

特徵描述

屬列表

標本列表

特徵描述

作者

SHIEH, WANG-CHUENG

型態特徵

Terrestrial ferns; rhizome erect or creeping, solenostelic or dictyostelic, clothed with scales. Fronds uniform or subdimorphic, 1-3-pinnate or variously divided, not articulate to rhizome; veins free or anastomosing without included free veinlets. Sori round or oblong, borne on distal ends or on the apical parts of veins, or forming continuous conenosori borne on the vascular commissure connecting the vein-ends, without true indusium, but protected by the modified and sharply reflexed leaf-margin and opening introrsely; sporangia developing in mixed sequence, with vertical annulus. Spores tetrahedral or rarely bilateral.

屬

A family of about 20 genera and 650 species, mainly tropical in distribution; six genera and 42 species in Taiwan.

參考文獻

SHIEH, WANG-CHUENG, Flora of Taiwan, second edition 1: 206. 1994. (Fl. Taiwan 2nd edit.)

Pteris 鳳尾蕨屬

作者

SHIEH, WANG-CHUENG

型態特徵

Rhizome short, erect or creeping, dictyostelic, clothed with scales. Fronds clustered, simply pinnate to bipinnate, or sometimes tripinnate, (the three branches subequal); herbaceous to coriaceous, glabrous or less commonly hairy; basal pair of pinnae (and sometimes others also) often with a branch (sometimes more than one branch) near the base on the basiscopic side, the branch similar in shape to the main part of the pinna but smaller; veins free except in sori, or anastomosing, without included free veinlets. Sori linear, submarginal, continuous along the margin, borne on a marginal connecting-vein, protected by the scarious reflexed margin, without other indusium, paraphysate; annulus of 14-34 thickened cells. Spores tetrahedral or less commonly bilateral, the surface usually more or less rugose or papillose.