18. Holomitrium Brid. 苞领藓属 bao-ling xian shu
Bryol. Univ. 1: 226. 1826.
Plants small to robust, yellowish green to brownish green, in dense tufts. Stems erect, usually branched; central strand present. Leaves lanceolate, erect at base, clasping or keeled, crispate to curled when dry, erect spreading when moist; margins entire to crenulate or serrulate; costa percurrent to excurrent, smooth at back or denticulate at the apex; upper cells small, rounded-quadrate, thick-walled, smooth; basal cells elongate-rectangular, thin-walled; alar cells differentiated, small. Dioicous or autoicous. Perichaetial leaves sheathing to convolute at base, long setaceous toward the apex. Setae erect, 1–2 per perichaetium; capsules erect, oblong-ovoid to cylindric, symmetric or slightly curved, asymmetric, smooth; opercula long-rostrate; annuli none; peristome teeth 16, inserted below the mouth, perforate along the median line or divided to the middle, papillose. Calyptrae cucullate, entire at base. Spores spherical, finely papillose.