20. Leucoloma Brid. 白锦藓属 bai-jin xian shu
Bryol. Univ. 2: 218. 1827.
Plants slender, soft, pale green or yellowish green, shiny, in compact or loose tufts. Stems reddish brown, blackish when dry, erect, usually branched, with very few rhizoids; central strand absent. Leaves erect-spreading, ascending or appressed, falcate-secund or crispate, tapered to a very long subulate acumen from an ovate-lanceolate base; margins entire except at the apex, sometimes faintly serrulate, distinctly bordered by linear, non-papillose, pellucid, thick-walled cells, the borders wider near leaf base; costa narrow, percurrent to excurrent in a long setaceous point, smooth at back except at the very tips; cells small, obscure, subquadrate to rectangular, thick-walled, multipapillose; alar cells differentiated, not extending near costa, quadrate to rectangular, hyaline or reddish brown, thick-walled. Dioicous. Male plants slightly smaller than the females. Setae erect, elongate; capsules erect, shortly cylindric, symmetric, attenuate at base; opercula long-rostrate; annuli in 2 rows; peristome teeth linear-lanceolate, divided halfway down or lower, smooth. Calyptrae cucullate, entire at base. Spores papillose.