Dennstaedtiaceae
碗蕨科
特徵描述
作者
SHIEH, WANG-CHUENG
型態特徵
Terrestrial; rhizome slender, creeping or erect, solenostelic or rarely dictyostelic, clothed with hairs or mixed narrow scales. Fronds pinnate to pinnately decompound, not articulate to rhizome; veins free or anastomosing without included free veinlets. Sori terminal on the veins, with a up-shaped or 2-lipped indusium, or the lower lip lacking, or the other continuous along the margin and on the connecting-vein, protected by the reflexed margin or with double indusium; spopangia developing in gradate or mixed sequence, with almost vertical annulus. Spores tetrahedral or rarely bilateral.
屬
A family of about 15 genera and 300 species, mainly tropical in distribution; seven genera and 24 species in Taiwan.
參考文獻
Dennstaedtia 碗蕨屬
作者
SHIEH, WANG-CHUENG
型態特徵
Rhizome creeping, solenostelic, clothed with rather stiff dark hairs. Fronds usually large, hairy or naked, more or less deltoid, pinnately decompound; veins free. Sori marginal, terminal on the veins; indusium formed by the fusion of an indusium in the strict sense and a minute tooth, to form a cup-shaped or slightly bivalvate structure, usually deflexed towards the lower surface of the lamina, annulus of 12-28 thickened cells. Spores tetrahedral.
About 70 species, nearly all tropical, ranging north to Japan and the United States, south to Chile and Tasmania, four species in Taiwan.
