腺齿铁角蕨 xian chi tie jiao jue

Plants 10-12 cm tall. Rhizome erect, short, densely scaly; scales narrowly triangular, with opaque dark brown-black central stripe and paler clathrate border, entire. Fronds caespitose; stipe purplish black, shiny, 5-11 mm, abaxially terete, adaxially flat but laterally with separate reddish brown fingerlike projections; lamina linear, 6-12(-14) × 0.9-1.2 cm, apex obtuse with terminal deltoid segment, 1-pinnate; pinnae 20-30 pairs, (sub)opposite to alternate, sessile, middle pinnae elliptic to trapeziform-oblong, 4-6 × 2-3 mm, base asymmetrical, acroscopic side truncate to broadly cuneate, basiscopic side narrowly cuneate, margin entire to repand, apex obtuse; apical pinnae hardly reduced, lower pinnae slightly and gradually reduced, often hastate or becoming subdeltoid. Costa obscure, venation anadromously pinnate, veins 2 or 3 pairs, simple. Fronds herbaceous to subleathery, grayish green when dry; rachis purplish black, shiny, abaxially terete, adaxially flat but laterally with fingerlike projections, these separated and rarely coalescent at their base into a low ridge. Sori 2-5 per pinna, linear-elliptic, ca. 1 mm, median on subtending vein, located in apical part of pinnae; indusia grayish brown, semi-elliptic, entire, opening toward costa.

● On rocks in forests; 1200-2400 m. Guizhou, NW Yunnan.

Asplenium glanduliserrulatum differs from A. trichomanes and A. quadrivalens by the fingerlike papillae bordering the wings on the rachis. It differs from A. humistratum by its smaller size and by the shape of its basal pinnae.