稜蒴藓科 ling shuo xian ke
by Wu Peng-cheng
Plants slender or rather robust, yellowish green, slightly glossy, in loose mats. Primary stems creeping, with leaves deciduous when old; secondary stems erect, simple or irregularly sparsely branched; a central strand absent; pseudoparaphyllia sometimes present, filamentous or foliose. Leaves oblong-ovate or broadly ovate, often plicate, acute or slenderly acuminate, rarely obtuse at the apex, sometimes slightly decurrent at the base; margins often serrulate above; costae double, weak, short or absent; leaf cells elongate-oblong or linear, smooth or prorate, thick-walled, porose; apical cells and basal cells oval; basal cells often colored. Dioicous. Perigonia small, bud-like. Perichaetia on branches; perichaetial leaves sheathing at the base, long acuminate. Setae elongate, smooth; capsules erect or curved, ovoid or oblong-ovoid, 8-furrowed; opercula conic, obliquely long rostrate; annuli narrow or not differentiated; peristome double; exostome teeth lanceolate, divided or joined, keeled, hyaline above, cross-striolate on outer surface or only at the base or smooth, trabeculate on inner surface; endostome segments linear-lanceolate, as long as the teeth, sometimes rudimentary; basal membrane usually high; cilia sometimes developed. Calyptrae cucullate. Spores spherical, brown, smooth.