Adiantaceae
鐵線蕨科
特徵描述
作者
SHIEH, WANG-CHUENG
型態特徵
Terrestrial ferns; rhizome erect, oblique or creeping, solenostelic or dictyostelic, clothed with either hairs of narrow brownish scales. Fronds uniform or rarely subdimorphic, 1-4-pinnate or pedate, rarely simple, not articulate to rhizome; veins free or rarely anastomosing without included free veinlets. Sori superficial, linear, following the course of veins, exindusiate or close to the margin, borne along the apical part of fertile veins on the underside of the sharply reflexed discolored membranaceous or coriaceous leaf-margin, which protects the sori as a false indusia. Sporangia with a vertical annulus, developing in mixed sequence. Spores tetrahedral.
屬
A family of about 20 genera and 300 species, widely distributed in the tropical and temperate regions of the world, seven genera and 23 species in Taiwan .
