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Published In: Muscologia Recentiorum Supplementum 4: 79. 1819[1818]. (Muscol. Recent. Suppl.) 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. 18, figs. 1–10).

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Map: Racomitrium lanuginosum (Hedw.) Brid. (Distribution in China)

Distribution     (Last Modified On 3/16/2009)
Distribution:
Habitat: on rocks or sandy soil in mountains.
Distribution: China, nearly worldwide in distribution except in Central America.
 

Specimens Examined     (Last Modified On 3/16/2009)
Specimens Examined:
Chinese specimens examined: Anhui: Mt. Huangshan, P.-C. Chen 6404 (PE). Jilin: Chang-bai Co., Y.-R. Lin 5 (MO); Mt. Changbai, T. Cao & B.-Y. Yan s.n. (IFSBH), C. Gao 22262 (IFSBH, MO), Vitt 34762, 34766 (ALTA, MO). Taiwan: Hua-lien Co., Shevock 14430 (CAS, MO); Mt. Nanhu Dashan, S.-H. Lin s.n. [Bryophytes of Taiwan Exsiccatae ser. 5, no. 94 (ALTA, MO)]; Ping-tung Co., C.-C. Chuang 1512 (ALTA, MO, NY). Xizang: Cha-yu Co., S.-G. Wu 1903 (HKAS); Ya-dong Co., M. Zang 33 (HKAS).

Notes     (Last Modified On 3/16/2009)
general taxon notes:
Racomitrium lanuginosum is usually characterized by its rather robust plants, smooth leaf cells, coarsely dentate hyaline hair-points that are long, strongly decurrent, and papillose. This species is typically growing on dry, exposed rocks or soil, often in whitish, extensive mats covering the rocks.

 

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17. Racomitrium lanuginosum (Hedw.) Brid.   白毛砂藓   bai-mao sha xian
Muscol. Recent. Suppl. 4: 79. 1819[1818]. Trichostomum lanuginosum Hedw., Sp. Musc. Frond. 109. 1801. Type. Europe.
Racomitrium hypnoides Lindb., Öfvers. Förh. Kongl. Svenska Vetensk.-Akad. 23: 552. 1866, nom. illeg.
 
Plants rather robust, 6–8 cm long, brownish green, sometimes grayish green due to long, hyaline hair-points, in loose, large and extensive cushions. Stems creeping, numerously bifurcately branched; central strand absent. Leaves imbricately appressed, often secund when dry, erect-spreading when moist, narrowly ovate-lanceolate, keeled above, 2.4–3.4 mm long, hyaline hair-points often well developed, sometimes shorter, decurrent at base, dentate and densely papillose; margins recurved on one side; costa strong, percurrent; leaf cells smooth, sinuosely thick-walled, unistratose at margins; upper cells rectangular, 12–23 µm × 4–6 µm; median cells longer, 16–32 µm × 4–5 µm; basal cells elongate-rectangular to linear, 23–46 µm × 3–4 µm; alar cells not differentiated, with only a row of rectangular to linear, hyaline cells, ca. 23–46 µm × 5 µm, with thin and straight walls. Sporophytes not seen.
 
 


 

 
 
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