Weissia

Mostly autoicous, rarely dioicous (not in Victoria). Asexual reproduction by rhizoidal tubers. Cushions or turves on soil. Stem erect, simple or irregularly branched, with sparse rhizoids at base; central strand present; sclerodermis weakly differentiated; hyalodermis not to distinctly differentiated. Leaves ligulate, oblong, triangular or lanceolate, erect- to wide-spreading or sharply reflexed above a sheathing base when moist, incurved and often contorted and spiralled when dry; apex obtuse, acute or acuminate, without a hairpoint but usually mucronate; costa usually excurrent, rarely subpercurrent (not in Victoria) or percurrent (not in Victoria), with quadrate, short-rectangular or elongate superficial cells adaxially, with a differentiated adaxial epidermis, with an adaxial stereid band, usually without a hydroid strand, with an abaxial stereid band, without a differentiated abaxial epidermis, with elongate superficial cells abaxially; margin entire, incurved or involute, at least in apical half, without a border; laminal cells in apical half subquadrate to hexagonal, pluripapillose on both surfaces, with a yellow KOH reaction, unistratose; basal laminal cells differentiated equidistant from base from margin to costa or occasionally extending further along margins, rectangular or occasionally rhomboid, smooth. Acrocarpous. Capsule erect or inclined, straight, ellipsoid, ovoid or cylindric, occasionally subglobose, immersed (not in Victoria) to exserted, operculate or cleistocarpous (not in Victoria), with or without an annulus. Calyptra cucullate, smooth, glabrous. Operculum conic (not in Victoria) or rostrate. Peristome absent, rudimentary or of 16 straight or slightly anticlockwise twisted teeth.