23. Oncophorus (Brid.) Brid. 曲背藓属 qu-bei xian shu
Bryol. Univ. 1: 389. 1826. Dicranum sect. Oncophorus Brid., Muscol. Recent. Suppl. 4: 53. 1819 .
Plants small to medium-sized, dull, green to yellowish brown, in dense tufts. Stems erect, simple or branched, somewhat radiculose below, rounded in transverse section. Leaves often strongly crispate when dry, erect-spreading to squarrose when moist, lanceolate from an obovate, erect or clasping base, rather abruptly narrowed to a subulate to linear-subulate apex; margins plane or recurved, entire or serrulate in the upper part, usually bistratose above; costa narrow, subpercurrent to excurrent, with 2 stereid bands; upper cells small, rounded-quadrate to short-rectangular, smooth; basal cells rectangular to linear, firm- to thick-walled; alar cells not differentiated. Autoicous or dioicous. Perichaetial leaves not much differentiated from the stem leaves. Setae solitary, straight, elongate; capsules oblong-ovoid to cylindric, suberect to inclined or horizontal, curved and asymmetric, distinctly strumose at the base, often slightly furrowed, not striate when dry and empty; opercula obliquely long-rostrate; annuli none or poorly developed; stomata present; peristome teeth 16, inserted at the mouth, reddish, lanceolate, divided at least halfway down, sometimes almost to the base. Calyptrae cucullate, smooth. Spores spherical, smooth or finely papillose.