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Athyriaceae

蹄蓋蕨科

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特徵描述

作者

SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and KUO, CHEN-MENG

型態特徵

Nearly all terrestrial ferns; rhizome usually short and stout, sometimes creeping and slender; scales thin, light brown to dark brown, lanceolate or ovate. Stipes with 2 vascular strands at base and uniting into a single U-shaped strand above; lamina usually thin, pinnate to decompound, rarely simple; veins usually free, goniopteroid in one genus, and forming areolae in two other genera; some species bearing multicellular septae hairs, usually glabrous; rachis groove generally open to receive rachilla grooves but not in all genera. Sori linear, single or double. J-shaped, sub-reniform or round; indusia usually present, sometimes small and fugacious, in Woodsia borne below the sporangia.

A family of about 15 genera, seven in Taiwan.

參考文獻

Diplazium 雙蓋蕨屬

作者

SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and KUO, CHEN-MENG

型態特徵

Rhizome creeping, ascending or erect; scales brown to black, usually narrow, linear-lanceolate, not clathrate. Stipe with 2 vascular bundles at base uniting in upper stipe to form a single U-shaped bundle, scaly at base, upper stipe and rachis sometimes sparsely scaly; lamina rarely simple, usually pinnate to bipinnate, but in many species tripinnatifid or tripinnate; texture firm herbaceous to subcoriaceous; veins free, or lower veinlets uniting and sending at excurrent veinlet to the sinus, or veins forming a row of large costal areolae and smaller elongate areolae without included veinlets. Sori linear, basal or medial along side of veinlets, usually single, sometimes doubled, nearly always doubled on the basal veinlets of a pinnule, near crossing a veinlet; indnsia linear, not reniform or J-shaped, entire or crenate.

參考文獻

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