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Adiantaceae

鐵線蕨科

特徵描述
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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.

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 .

參考文獻

Coniogramme 鳳了蕨屬

作者

SHIEH, WANG-CHUENG

型態特徵

Rhizome creeping, usually short, dictyostelic or rarely solenostelic, clothed with narrow brown scales. Fronds fairly large, simply pinnate or bipnnate, with few and large, entire or serrulate leaflets, herbaceous or more firm, usually glabrous; veins free and once or twice forked, or rarely anastomosing without included free veinlets, ending in hydathodes. Sori continuous along the veins, exindusiate, the sporangia mixed with small paraphyses; annulus of 13-22 thickened cells. Spores tetrahedral or rarely bilateral, smooth, without perispore.

參考文獻

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