1. Antitrichia Brid.   逆毛藓属   ni mao xian shu

Muscol. Recent. Suppl. 4: 136. 1819.

 

Plants slender, elongate, yellowish green. Primary stems creeping; secondary stems prostrate or pendulous, usually irregularly pinnately branched, with short branches or slender flagelliform branches. Leaves cordate and slightly decurrent at the base, slenderly long acuminate toward the apex; upper margins dentate, often with teeth recurved; costae single, reaching to leaf apex, sometimes shortly branched at base of costa; leaf cells thick-walled, porose, median and upper cells elongate-rhomboidal, smaller close to the margin and the leaf base, often reddish brown at insertion; cells at basal margin differentiated in many oblique rows. Dioicous. Inner perichaetial leaves ecostate, highly sheathing at the base, slenderly long acuminate. Setae elongate, purple, straight or curved, sometimes twisted when dry; capsules erect or slightly curved, symmetric, oblong-ovoid; opercula conic-rostrate; annuli differentiated, in a single row of differentiated cells; peristome double; exostome teeth narrowly lanceolate, densely papillose, often cross-striolate at the base; endostome segments linear, nearly as long as or shorter than the teeth, fragile; basal membrane and cilia none. Calyptrae cucullate, smooth. Spores spherical, densely papillose.