扭柄藓属

Plants small, slender, yellowish green to yellowish brown, in loose tufts. Stems erect, simple or sparsely branched. Leaves appressed, broadly ovate and sheathing at base, abruptly narrowed to a long-lanceolate subula; margins entire or serrulate at the apex; costa strong, filling all of the subula, with a median row of guide cells and several rows of stereids on either ventral and dorsal sides in transverse section; cells thin-walled, in the upper shoulder short-rectangular to elongate-oval, in the lower shoulder becoming narrowly rectangular; alar cells not differentiated. Dioicous or autoicous. Setae elongate, curved when moist, flexuose when dry; capsules erect or suberect, ovoid to cylindric, symmetric, with a short neck, striate when dry and empty; stomata present, superficial; annuli developed; opercula obliquely long rostrate; peristome teeth 16, brownish, divided to halfway down or lower, vertically striate below, papillose above. Calyptrae cucullate, smooth. Spores finely papillose, golden yellowish.

Campylopodium is close to Microcampylopus, and both genera are characterized by having curved setae and Dicranella-like plants. Only two species of Campylopodium are currently recognized in the world (Giese and Frahm 1986b). One species is known from China.

Lower Taxon

• Campylopodium medium (Duby) Giese & J.-P. Frahm