22. Microdus Schimp. ex Besch. 小毛藓属 xiao mao xian shu
Mém. Soc. Sci. Nat. Cherbourg 16: 161. 1872. Dicranella subg. Microdus (Schimp. ex Besch.) Broth., Nat. Pflanzenfam. 1(3): 309. 1901.
Plants small, slender, yellowish green, not glossy, gregarious to loosely tufted. Stems erect, simple or rarely branched, radiculose at base. Leaves carinate, lanceolate from a narrow base; margins narrowly recurved, serrulate at the apex; costa percurrent; leaf cells prosenchymatous, elongate-hexagonal to linear rectangular; basal cells shorter, becoming quadrate to hexagonal; alar cells not differentiated. Dioicous. Perichaetial leaves only slightly differentiated from vegetative leaves. Setae straight, slender, yellowish or reddish; capsules erect, ovoid to short-cylindric; opercula long-rostrate; annuli differentiated, compound; peristome teeth usually undivided, rarely divided or perforate in the tips, papillose on both surfaces above the middle, irregularly striate from base to the middle. Spores spherical, smooth or papillose.