短壶藓科 duan-hu xian ke
by Si He and Gao Chien
Plants small to rather large, slender, soft, green or yellowish green to reddish brown, in loose or dense tufts. Stems erect, simple or infrequently branched; central strand not differentiated or only weakly differentiated. Leaves sparse below, more crowded above, more or less contorted when dry, erect-patent when moist, oblong-ovate or lingulate, rounded obtuse to sometimes bluntly acute or apiculate at apex; margins plane, entire to minutely crenulate, sometimes bordered; costa single, ending above the midleaf to just below leaf apex or sometimes percurrent; leaf cells lax, thin-walled, smooth. Dioicous. Perigonia minute, budlike, terminal, without paraphyses. Perichaetia terminal or lateral, perichaetial leaves not differentiated from stem leaves. Setae erect, short to elongate, 4–15 mm long; capsules oblong-ovoid to cylindrical; stomata present in the neck, superficial; opercula conic or apiculate to long-rostrate; annuli none; peristome single, narrowly lanceolate, deeply inserted below the mouth, more or less papillose. Calyptrae larger, cucullate, naked. Spores spherical, minutely papillose.