特徵描述
作者
SHIEH, WANG-CHUENG
型態特徵
Terrestrial or in few species climbing; rhizome creeping, protostelic, clothed with narrow scales or with hairs (or both). Fronds pinnately divided, sometimes very finely, in a few cases simple, not articulated to rhizome; veins free or anastomosing without included free veinlets. Sori marginal or nearly marginal, terminal on the veins, simple (on apices of separate veins) or joined to form a fusion-sori (coenosori) of varying lengths, upon submarginal soral veins joining the form a ends of the normal veins; indusia always present, attached on the basal side of the sorus and opening towards the margin, in some cases attached by its sides as well as base; sporangia developing in gradate sequence, with vertical annulus. Spores tetrahedral or rarely bilateral.
屬
A family of about ten genera and 250 species, mainly tropical in distribution; three genera and 11 species in Taiwan.
參考文獻
Sphenomeris 烏蕨屬
作者
SHIEH, WANG-CHUENG
型態特徵
Terrestrial; rhizome short-creeping, protostelic, clothed with dark brown narrow scales. Fronds of moderate size, pinnately decompound, finely dissected, the ultimate pinnules or segments usually cuneate, glabrous; veins free. Sori submarginal, terminal on a vein, or uniting the apices of 2-3 veins; indusia fixed by the base and more or less by the sides, opening towards the margin; annulus of 12-24 thickened cells. Spores bilateral or rarely tetrahedral, without perispore.
