25. Oreoweisia (Schimp.) De Not. 石毛藓属 shi-mao xian shu
Epil. Briol. Ital. [Atti R. Univ. Genova 1:] 489. 1869. Weissia subg. Oreoweisia Schimp. in B.S.G., Bryol. Eur. 1: 71 (fasc. 33–36 Mon. 11). 1846.
Plants slender and soft, green or brownish green, in tufts. Stems triangular, erect, usually branched, radiculose at base; central strand present in transverse section. Leaves curled or crispate when dry, erect-patent when moist, lanceolate to oblong-lanceolate or narrowly oblong-ovate to lingulate; margins serrulate above the middle or only at the apex; costa strong, narrow, subpercurrent to percurrent; upper cells rounded-quadrate, thick-walled, usually mammillose or papillose on both surfaces; lower cells rectangular, rather thin-walled, smooth; alar cells not differentiated. Autoicous. Perichaetial leaves similar to the upper stem leaves. Setae straight and elongate, 1–2 per perichaetium; capsules erect, sometimes slightly inclined, oblong-ovoid to cylindric, smooth when dry; opercula short- to long-rostrate; annuli in 1–3 row of cells, usually persistent; peristome teeth 16, inserted below the mouth, lanceolate, undivided, smooth or slightly perforate and irregularly striate. Calyptrae cucullate, smooth at base. Spores spherical, papillose or warty.