Trichostomum aristatulum (Broth.) Hilp. ex P.-C. Chen, Hedwigia 80: 167. 1941, hom. illeg. Hyophila aristatula Broth., Akad. Wiss. Wien Sitzungsber., Math.-Naturwiss. Kl., Abt. 1, 131: 211. 1923.

Plants small to medium-sized, to 30 mm high, dark green to light brown, in dense tufts. Stems erect, usually irregularly branched. Leaves contorted-curved when dry, erect-spreading or weakly reflexed when moist, narrowly ovate-lanceolate, acute or apiculate at apex, upper lamina weakly channeled, somewhat sheathing at base; margins usually plane, sometimes incurved, entire or crenulate by projecting papillae; costa stout, excurrent as an apiculus; upper leaf cells rounded-hexagonal, moderately thick-walled, green and obscure, each cell with several large, circular papillae on both surfaces; basal cells slightly elongate, irregularly rectangular, smooth, hyaline. Sporophytes not seen.

Type. China: Hunan, Chang-sha (Tschangscha), Handel-Mazzetti 11603 (holotype H).

Specimens examined: HEBEI: Long-guan Co., K.-J. Guan 4314 (PE). HENAN: Hui Co., H.-J. Yu 1023 (PE); Tong-bai Co., H.-J. Yu 133a, 114 (PE). JIANGXI: Lu Shan (Mt.), S.-L. Wang X–0029 (PE). XIZANG: Ya-dong Co., M. Zang 255a (HKAS). YUNNAN: Kun-ming City, Z.-M. Li 367a (HYUB); Li-jiang Co., X.-J. Li 85479 (HKAS).

Habitat: on rocks, forest ground, or soil; rarely on tree trunks; Distribution: endemic to China.

Illustrations: Pl. 136, figs. 6–9.