3. Microdendron Broth. in Handel-Mazzetti 树发藓属 shu fa xian shu
Symb. Sin. 4: 137. 1929.
Plants medium-sized, 3–10 cm high, thick, mostly dark green, erect, scattered or in gregarious tufts. Stems equally branched above, crowded as an umbrella-like tuft, nude below, with scale-like leaves at base; rhizoids numerous; in stem cross section central strand developed. Leaves triangular-lanceolate to ovate-lanceolate, 3–7 mm long, sometimes slightly concave, strongly crisped when dry, erect-patent when moist; margins serrate with one-celled teeth, serrulate below; costa rigid, ending in the acumen, grossly spinulose on the back near apex; ventral lamellae dense above the midleaf, often in 20–40 rows, 2–3(–5) cells high; marginal cells slightly smaller; median cells bistratose, ovate or irregularly rounded quadrate; basal cells larger, shortly rectangular or quadrate. Dioicous. Perigonia in rosettes. Setae straight to slightly twisted when dry, reddish brown; capsules long-cylindrical, erect; exothecial cells more or less low-papillose; peristome teeth 32; opercula flat-conic, with short beaks. Calyptrae densely ciliate, with yellowish hairs, covering the whole capsules. Spores spherical, 8.5–15 µm in diameter, verrucose.