Triquetrella

Dioicous. Asexual reproduction by axillary clusters of leaf-like gemmae. Mats or tufts on soil or rocks. Stem occasionally branching, triangular in cross-section, with sparse rhizoids near base; central strand absent or rarely present (not in Victoria); sclerodermis present; hyalodermis absent. Leaves triangular or lanceolate to ovate-triangular, wide-spreading to squarrose when moist, appressed, with incurved apices or sometimes contorted when dry, arranged in three rows that often spiral around stem, broadly decurrent; apex acute or acuminate, without a hairpoint; costa subpercurrent, percurrent or excurrent, with elongate adaxial superficial cells, without a differentiated adaxial epidermis, with or without an adaxial stereid band, without a hydroid strand, with an abaxial stereid band, with a weakly differentiated abaxial epidermis, with elongate or rhombic-quadrate abaxial superficial cells; margin entire, recurved away from apex, without a border; laminal cells rounded rhombic, hexagonal or quadrate, rectangular at insertion or throughout base, unipapillose of bipapillose with simple or bifid spiculose papillae, or rarely pluripapillose with dome-shaped papillae, with an orange or yellow-orange KOH reaction. Acrocarpous or cladocarpous. Capsule erect, straight, ellipsoid to cylindric, exserted, operculate, with an annulus. Calyptra cucullate. Operculum conic or rostrate. Peristome of 16 teeth, usually split to base or occasionally perforate.