Dicranella microcarpa Broth., Öfvers. Förh. Finsk Vetensk.-Soc. 62A (9): 1. 1921. Dicranella tosaensis Broth. in Shin., J. Jap. Bot. 26: 301. 1951, nom. nud.

Plants minute, up to 4 mm high, green to brownish green, scattered or in loose tufts. Stems erect, simple, somewhat radiculose at base. Lower leaves small and short, upper ones larger and longer, up to 3 mm long, rather abruptly narrowed from a nearly triangular base to a subulate, semi-canaliculate acumen; margins plane below, involute and serrulate above; costa percurrent, yellowish or reddish brown, smooth at back; upper and median cells linear to long-rectangular; 50–65 µm × 4–6 µm; lower and basal cells short-rectangular to subquadrate, lax and wider, 20–40 µm × 10–15 µm. Dioicous. Perichaetial leaves differentiated, sheathing at base, with a long and setaceous acumen. Setae straight, 3–4 mm long, yellowish brown; capsules erect, ovoid, with a very short, indistinct neck, plicate when dry; opercula obliquely long-rostrate, 0.9 mm long; annuli in 3 rows of large cells, deciduous; peristome teeth lanceolate, divided to the middle, vertically striate and reddish orange below. Spores 20–25 µm in diameter, finely papillose.

Type. Japan.

Chinese specimens examined: HAINAN: Diaoluo Shan (Mt.), C. Gao 2706 (IFSBH). HEILONGJIANG: Fu-yuan Co., C. Gao 6284 (IFSBH). HUNAN: Changsha City, Yueluo Shan (Mt.), C. Gao 22 (IFSBH).

Habitat: on soil; Distribution: China and Japan.

Illustrations: Pl. 32, figs. 1–10.