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Published In: Scottish Cryptogamic Flora 3: 123. 1825. (Scott. Crypt. Fl.) Name publication detail

Project Name Data (Last Modified On 3/16/2009)
Acceptance : Accepted
Project Data     (Last Modified On 3/16/2009)
General Reference:

Illustration & Map     (Last Modified On 3/16/2009)
Related Objects:
Illustrations: X.-J. Li (ed.) 2000 (Pl. 9, 1–10); T. Cao & Vitt 1986 (Fig. 26).

Click here for distribution map.
Map: Grimmia unicolor Hook. (Distribution in China)

Distribution     (Last Modified On 3/16/2009)
Habitat: on exposed rocks, sometimes on boulders near streams.
Distribution: China, India, Kazakstan, Russia, Europe, and North America.

Specimens Examined     (Last Modified On 3/16/2009)
Specimens Examined:
Chinese specimens examined: Jilin: Mt. Changbai, C. Gao 1194 (IFSBH); Z.-W. Ao 5091 (IFSBH). Shaanxi: Mt. Huashan, P.-C. Chen 764 (MO), D.-K. Li 15197 (ALTA, IFSBH, SHM), W.-M. Zhu 7911 (HKAS). Xizang: Nie-la-mu Co., K.-Y. Lang 323 (PE); Ya-dong Co., M. Zang 444 (HKAS).

Notes     (Last Modified On 3/16/2009)
general taxon notes:
Grimmia unicolor is characterized by having dark brown to blackish, densely tufted plants and concave, rigidly erect, imbricate leaves that are oblong-lanceolate from a broader base and muticous or obtuse at apex. The upper leaf cells are obscure, consisting of two or more layers in cross sections. The capsules are exserted, on long, straight setae. Grimmia unicolor is closely related to G. atrata, but differs from the latter by having unkeeled leaves with rounded-obtuse apices and elongate basal marginal leaf cells. In contrast, Grimmia atrata has obtusely keeled leaves with somewhat acuminate apices and quadrate to rectangular basal marginal leaf cells.


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23. Grimmia unicolor Hook. in Grev.   厚边紫萼藓   hou-bian zi-e xian
Scott. Crypt. Fl. 3: 123. 1825. Dryptodon unicolor (Hook.) Hartm., Handb. Skand. Fl. (ed. 3), 272. 1838. Type. United Kingdom: “Rocks near Bachnagain, the Honourable D. Ogilvie’s hunting lodge at the head of Clova” (isotype BM).
Plants medium-sized, up to 3 cm high, yellowish green above, dark green to blackish below, in dense tufts. Stems erect, regularly branched from innovations above, with well developed central strand in cross section. Leaves erect and imbricate when dry, erect-spreading when moist, concave and somewhat cucullate, rounded at the apex, not keeled, 1.7–2.2 mm long, oblong-lanceolate, narrowed from a broader base to lanceolate, muticous, narrowly obtuse; margins erect, entire; costa flattened, subpercurrent, ending shortly below the apex, without distinct small cells in cross section; upper cells irregularly rounded, obscure, 5–7 µm wide, bistratose or sometimes tristratose in places at margins, with strongly incrassate, sinuose walls; basal marginal cells rectangular, 18–23 µm × 6–9 µm, with straight walls; basal juxtacostal cells elongate, 34–46 µm × 5–7 µm, with thick, somewhat sinuose walls. Dioicous. Perichaetial leaves similar to the upper stem leaves in shape, but larger. Setae yellowish to yellowish brown, straight, ca. 2–3 mm long; capsules exserted, erect and symmetric, oblong-cylindrical, 1.5 mm long, smooth when moist, slightly wrinkled-striate when old and dry; exothecial cells variable in shape, usually elongate-hexagonal with thin, straight walls; stomata present at base of urns; annuli differentiated, composed of 2–3 rows of thick-walled cells; opercula concave-conic, with a short beak; peristome teeth lanceolate, reddish brown, imperfectly divided into 2 segments in upper part, perforate in the middle, outer surface densely papillose above, sparsely papillose below, inner surface papillose throughout. Calyptrae mitrate, lobed at base, often split further up on one side. Spores 8–12 µm in diameter, yellowish, smooth to finely papillose.


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