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Moss China | Family List | Moss China V. 1 | Dicranaceae | Pseudochorisodontium

5. Pseudochorisodontium ramosum (C. Gao & Z.-W. Ao) C. Gao, Vitt, X. Fu & T. Cao, Moss Fl. China. 1: 227. 1999; Dicranum ramosum C. Gao & Z.-W. Ao, Bull. Bot. Lab. N.-E. Forest. Inst., Harbin 7: 97. 1980.

Plants medium-sized to large, up to 5(–8) cm high, yellowish green or dull green, in shiny tufts. Stems erect, or ascending, usually 3–5-branched, rarely simple, densely foliate, radiculose below. Leaves erect-flexuose or weakly contorted or crispate when dry, erect-spreading when moist, up to 7 mm long, contracted at base, abruptly narrowed from a broadly ovate and somewhat concave base to a short, setaceous acumen; the acumina as long as or shorter than the base; margins plane, nearly entire throughout, rarely minutely serrulate at the extreme apex; costa slender, occupying 1/10 – 1/6 the leaf base width, percurrent or shortly excurrent, smooth or low mammillose at back above; upper cells irregular, short-rhomboidal or elliptical, thick-walled, smooth, or sometimes low mammillose at back; basal cells oblong-rhomboidal or elongate-elliptical, thick-walled, porose; alar cells quadrate or rounded quadrate, inflated, 3–4 stratose, yellowish brown. Dioicous. Sporophytes not seen.

Type. China: Xizang, Ya-dong Co., M. Zang 799 (holotype KUN; isotype IFSBH).

Specimens examined: XIZANG: Cuo-na Co., KUN Ecol. Dept. Xizang Team 7401(b) (IFSBH, KUN); Mi-lin Co., Y.-G. Su 2418, 5062 (IFSBH, KUN).

Habitat: on soil or soil over rocks; Distribution: endemic to China.

Illustrations: C. Gao (ed.) 1994 (Pl. 137, figs. 1–9).


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