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Published In: Acta Botanica Yunnanica 3: 394. f. 4: 10–16. 1981. (Acta Bot. Yunnan.) Name publication detail

Project Name Data (Last Modified On 4/15/2009)
Acceptance : Accepted
Project Data     (Last Modified On 5/4/2009)
General Reference:

Illustration & Map     (Last Modified On 5/4/2009)
Illustrations: Grimmia obtusifolia C. Gao & T. Cao (Figs. 12–22.)
Map: Grimmia obtusifolia C. Gao & T. Cao (Distribution in China)

Distribution     (Last Modified On 5/4/2009)
Habitat: on dry, exposed rocks or thin soil over rocks in high mountain areas; alt. 4500–5000 m.
Distribution: endemic to China.


Specimens Examined     (Last Modified On 5/4/2009)
Specimens Examined:
Chinese specimens examined: Sichuan: Nan-ping Co., Allen 7176 (MO); Song-pan Co., Allen 7259, 7266 (both in MO), Redfearn et al. 35464 (MO). Xizang: Ban-ge Co., K.-Y. Lang 1259, 1260, 1262, 1265 (all in IFSBH, PE), 1230, 1237 (both in IFSBH, MO, PE); Chang-du Co., M. Zang 5293 (HKAS); Shuang-hu Co., K.-Y. Lang 1363 (IFSBH, PE).


Notes     (Last Modified On 5/4/2009)
general taxon notes:
Grimmia obtusifolia is distinguished from other species of Grimmia by small and slender plants, concave and somewhat cucullate, rounded-obtuse, muticous leaves, and short basal marginal leaf cells. It is somewhat similar to G. mollis Bruch & Schimp. in having concave, cucullate, rounded-obtuse, and muticous leaves. The two species differ by the leaves being crowded, imbricate, rigid, broadly oblong-ovate, upper leaf cells small, 5–7 µm wide, bistratose, and thick-walled in G. obtusifolia and by the leaves being loose, not imbricate, soft, ovate to broadly ovate, upper leaf cells larger, 11–17 µm wide, unistratose, and thin-walled in G. mollis. Grimmia obtusifolis is also similar to Schistidium chenii (S.-H. Lin) T. Cao, C. Gao & J.-C. Zhao in having concave, rounded-obtuse, muticous leaves; however, S. chenii differs from G. obtusifolia in having more robust plants and thin-walled leaf cells.



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16. Grimmia obtusifolia C. Gao & T. Cao in C. Gao, G.-C. Zhang & T. Cao   钝叶紫萼藓   dun-ye zi-e xian
Acta Bot. Yunnan. 3(4): 394. 1981. Type. China: Xizang, Shuang-hu Co., alt. 4850 m, K.-Y. Lang 1347 (holotype IFSBH; isotypes ALTA, PE); Ban-ge Co., alt. 4800 m, K.-Y. Lang 1232 (paratypes IFSBH, MO, PE).
Plants small, slender, up to 1.0(–1.5)cm high, dark green to blackish brown above, brownish to pale brown below, in dense tufts. Stems erect, much branched from innovations beneath the apex, with well developed central strand in cross section. Leaves erect, imbricate, closely appressed when dry, erect-spreading when moist, concave, somewhat cucullate, not keeled, 0.7–1.4 mm long, oblong-ovate, rounded-obtuse, muticous, the lower leaves smaller and wider at base; margins plane, entire; costa prominent, ending just below the apex, with small median cells in several irregular rows in cross section; upper and median cells bistratose throughout, obscure, 5–7 µm wide, rounded-quadrate, with thick, more or less sinuose walls; basal marginal cells subquadrate to quadrate, 12–14 µm wide, with straight, somewhat thick walls; basal juxtacostal cells elongate to rectangular, 15–21 µm × 7–9 µm, with thick, straight to sinuose walls; alar cells differentiated, large, ca. 21 µm × 14–16 µm. Sporophytes unknown.


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