Aspidiaceae

三叉蕨科

PPG

Tectariaceae 三叉蕨科

特徵描述

屬列表

標本列表

特徵描述

作者

TSAI, JINN-LAI and SHIEH, WANG-CHUENG

型態特徵

Terrestrial ferns, a few growing in crevices of rocks; rhizomes creeping or suberect; rhizome and stipe scales usually long and brown, narrowly linear. Fronds pinnate to decompound; stipes usually with a ring of vascular bundles (with only 2 bundles in Quercifilix), stipes and rachis grooved, the rachis grooves not open to rachilla grooves; upper side with ctenitis hairs along rachis, rachillae and costae in nearly all taxa; veins anastomosing in most genera, with at least one row of costal areolae, the areolae often with included veinlets, some genera with free venation. Sori usually round, dorsal on veinlets, on a plexus of veinlets, or terminal on a veinlet within an areola; in two genera (Hemigramma and Quercifilix) the sporangia follow the veins, becoming acrostichoid; indusia usually present, sometimes fugacious, round-reniform.

屬

A family of about 20 genera with over 800 species, cosmopolitan, 9 genera in Taiwan.

參考文獻

TSAI, JINN-LAI and SHIEH, WANG-CHUENG, Flora of Taiwan, second edition 1: 280. 1994. (Fl. Taiwan 2nd edit.)

Tectaria 三叉蕨屬

作者

TSAI, JINN-LAI and SHIEH, WANG-CHUENG

型態特徵

Terrestrial ferns of moderate or large size; rhizomes short-creeping to erect, stout, paleate, usually with ample, thin, entire paleae. Stipes clustered, elongate, scaly at base or throughout, often ebeneous; fronds pinnate to bipinnate, rarely simple, never finely dissected, basal pinnae largest, basiscopic pinnules of lowest pinnae often enlarged, the pinnae or segments commonly entire, never aristate; rachises grooved on uperside, rachillae not grooved, or if grooved not entering the rachis grooves; ctenitis hairs usually present on upper sides of stipes, rachises and costae; veins variously anastomosing, often with a series of arched veins along the costae, the areolae usually with free included veinlets. Sori compital, dorsal or terminal on the veinlets, typically round, sometimes oval to elongate; indusia peltate or round-reniform or wanting. Spores oblong with thick epispores, becoming tuberculate or spinulose.