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Published In: Bryologia Europaea 5: 185. 495 (fasc. 48 Monogr. 7. 2). 1851. (Bryol. Eur.) Name publication detail

Project Name Data (Last Modified On 4/1/2009)
Acceptance : Accepted
Project Data     (Last Modified On 4/1/2009)
General Reference:

Illustration & Map     (Last Modified On 4/1/2009)
Related Objects:
Illustrations: R.-L. Hu & Y.-F. Wang (eds.) 2005 (Pl. 100, figs. 8–18).

Click here for distribution map.

Map: Plagiothecium laetum Schimp. (Distribution in China)

Distribution     (Last Modified On 4/1/2009)
Habitat: on soil, tree trunks, and rotten wood; alt. 1500–3250 m.
Distribution: China, Russia, Europe, and North America.

Specimens Examined     (Last Modified On 4/1/2009)
Specimens Examined:
Chinese specimens examined: Jilin: Mt. Changbai, C. Gao 1075, 4180 (both in IFSBH), D.-K. Li 9939, 10104, 10117, 10165 (all in SHM), P.-J. Lin 2286, 7269 (both in IBSC). Nei Mongol: Da Xing An Ling (Mt.), P.-C. Chen & C. Gao 851, 1011 (both in IFSBH). Shaanxi: Mt. Taibai, Z.-P. Wei 5382, 5797 (both in WUK). Sichuan: Barkam Co., Forest Research Institute 1058 (MO). Xinjiang: He-jing Co., S. He 951186 (MO). Xizang: Ya-dong Co., M. Zang 578a (HKAS); Zha-mu, S.-G. Wu 1127b (HKAS). Yunnan: Shangri-la Co., X.-J. Li 1954, 2777 (both in HKAS).

Notes     (Last Modified On 4/1/2009)
general taxon notes:
Plagiothecium laetum is similar to P. latebricola Schimp., but it differs by its only slightly secund leaves that are gradually contracted to a slender apex, and by its autoicous sexuality.


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7. Plagiothecium laetum Schimp. in B.S.G.   光泽棉藓   guang ze mian xian
Bryol. Eur. 5: 185. 1852. Leskea laeta (Schimp.) Berggr., Acta Univ. Lund. 2 Afd. 3(7): 8. 1866. Plagiothecium denticulatum var. laetum (Schimp.) Lindb., Not. Sällsk. Fauna Fl. Fenn. Förh. 9: 31. 1868. Plagiothecium denticulatum subsp. laetum (Schimp.) Kindb., Bih. Kongl. Svenska Vetensk.-Akad. Handl. 7(9): 46. 1883. Type: Switzerland.
Plants small, pale green or yellowish green, glossy, in loose mats. Stems prostrate, to ca. 2.0 cm long; leafy stems and branches complanate or slightly julaceous. All leaves more or less imbricate, distantly spaced, erect-spreading, often undulate, sometimes secund, usually asymmetric, narrowly ovate-lanceolate, 0.7–1.7 mm × 0.3–1.2 mm, gradually acuminate at apex; margins plane or narrowly reflexed near apex, usually entire, or serrulate near apex; costae short, double; median leaf cells linear-rhomboidal, 90–160 µm × 4–10 µm; basal cells rectangular, porose; alar regions decurrent, in a triangular shape, consisting of 1–3 rows of rectangular cells. Brood bodies present, often consisting of 3–6-celled gemmae. Autoicous. Setae 10–16 mm long, orange, brownish, or somewhat reddish; capsules erect or inclined, 1.5–2.0 mm long, smooth when dry; opercula 0.3–0.8 mm long; annuli deciduous; cilia 1–3, sometimes absent.


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