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Published In: Bryologia Universa 1: 183. 1826. (Bryol. Univ.) 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. 10, figs. 1–10); T. Cao & Vitt 1986 (Fig. 31).

Click here for distribution map.

Map: Grimmia laevigata (Brid.) Brid. (Distribution in China)

Distribution     (Last Modified On 3/16/2009)
Habitat: on dry, exposed, siliceous rocks or thin soil over rocks, mostly at high elevations.
Distribution: China, India, Sri Lanka, Pakistan, Kazakstan, Russia, Europe, North Africa, South and North America, Australia, and New Zealand.

Specimens Examined     (Last Modified On 3/16/2009)
Specimens Examined:
Chinese specimens examined: Hebei: Mt. Wuling, J.-X. Ji C10 (IFSBH). Shaanxi: Mt. Taibai, G. Fenze 1853 (S). Sichuan: Dao-cheng Co., S. He 31698 (MO), M.-Z. Wang 814001 (PE). Xinjiang: He-jing Co., R.-L. Hu 950136 (MO, SHM). Xizang: Ang-ren Co., J.-W. Zhang 7506 (PE); Ba-su Co., M. Zang 5255 (HKAS); Ban-ge Co., K.-Y. Zhao 30a (IFSBH); Cha-yu Co., G.-C. Zhang & J.-Y. Feng 14808 (IFSBH), M.-Z. Wang 8190 (PE); Ding-qing Co., M. Zang 5337 (HKAS); Ji-long Co., J.-W. Zhang 7512(1) (PE); Lang Co., M. Zang 1694 (HKAS); Long-zi Co., M. Zang 1159 (HKAS); Nei-la-mu Co., C.-F. Zhao 117 (IFSBH); Shuang-hu Co., K.-Y. Lang 1328 (PE); Ya-dong Co., M. Zang 746 (HKAS). Yunnan: De-qin Co., X.-J. Li 81-1576 (HKAS); Qiu-bei Co., D.-K. Li 02883 (SHM). Zhejiang: Ping-hu Co., D.-K. Li 016137 (ALTA, SHM).

Notes     (Last Modified On 3/16/2009)
general taxon notes:
Grimmia laevigata is characterized most by the following character states: 1) leaves oblong-ovate to oblong-lanceolate, concave, unkeeled, ending in long spinulose awns; 2) upper and median leaf cells obviously obscure, small, and bistratose; 3) basal marginal leaf cells quadrate to subquadrate with transverse walls much thicker than the longitudinal ones. In addition, the long, straight seta (1.7–2.0 cm long) is a distinct feature. This species is closely related to G. ovalis. Both have unkeeled leaves ending in long hyaline hair-points and have exserted capsules. It differs from G. ovalis in having smaller and more rigid plants, wider leaf bases with shorter upper parts, and shorter basal marginal leaf cells. Gametophytically, G. laevigata is also similar to G. tergestina, which has immersed capsules in large, differentiated perichaetial leaves. The basal marginal leaf cells are clearly distinguishable between these two species. Grimmia laevigata has quadrate to subquadrate basal marginal leaf cells with transverse walls much thicker than the longitudinal ones, while G. tergestina has elongate-rectangular basal marginal leaf cells with rather thin walls. The variation in G. laevigata usually occurs in the leaf shape and hyaline hair-points. The leaf bases vary from broadly ovate to ovate, sometimes even narrowly ovate. The hyaline hair-points are often long and denticulate, but some Chinese specimens have short, poorly developed, hyaline hair-points, especially from some upper leaves.


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11. Grimmia laevigata (Brid.) Brid.   阔叶紫萼藓   kuo-ye zi-e xian
Bryol. Univ. 1: 183. 1826. Campylopus laevigatus Brid., Muscol. Recent. Suppl. 4: 76. 1819[1818]. Type. Italy: “In Tyrole Italico, item circa Romam, Neapolin et in insula Ischia in rupibus apricis 1806 abunde” (lectotype B, designated by T. Cao & Vitt 1986).
Plants small, up to 1.5 cm high, dark green to dark brown, in dense or loose, rigid tufts. Stems mostly simple, with well developed central strand in cross section. Leaves erect, imbricate, closely appressed when dry, spreading when moist, larger and crowded toward stem tips, 1.5–2.9 mm long, oblong-ovate to oblong-lanceolate, concave, never keeled, ending in a spinulose, hyaline hair-point, ca. 0.4–1.0 mm long; the lower leaves smaller, more or less muticous; margins plane, entire; costa slender, broad at leaf base, ending near the apex, in cross section flattened, with small median cells and small abaxial cells; upper cells bistratose, obscure, small, 5–7 µm wide, irregularly rounded-quadrate, thick-walled; basal marginal cells short, quadrate or nearly so, 6–14 µm × 9 µm, with transverse walls thicker than longitudinal ones; basal juxtacostal cells elongate, 14–64 µm × 5–7 µm. Dioicous. Perichaetial leaves similar to upper stem leaves. Setae straight, twisted to left when dry, 1.7–2.0 mm long, yellowish brown; capsules reddish brown, 1.0–1.5 mm long, ovoid to oblong-cylindrical, nearly smooth when dry; exothecial cells irregularly quadrate, thick-walled; stomata present near base of urn; annuli differentiated in 2–3 rows of elongate cells with very thick walls; opercula with short beaks; peristome teeth erect, lanceolate, ca. 0.2 mm long, variously split and perforate above, reddish brown, outer surface densely papillose above, finely papillose below, inner surface papillose throughout. Calyptrae mitrate. Spores 7–9 µm in diameter, yellowish, nearly smooth.


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