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Published In: Symbolae Sinicae 4: 107. 1929. (Symb. Sin.) Name publication detailView in Biodiversity Heritage Library

Project Name Data (Last Modified On 3/30/2009)
Acceptance : Accepted
Project Data     (Last Modified On 5/5/2009)
General Reference:

Illustration & Map     (Last Modified On 5/5/2009)
Illustrations: Brachythecium perscabrum Broth. (Figs. 1–12.)
Map: Brachythecium perscabrum Broth. (Distribution in China)

Distribution     (Last Modified On 5/5/2009)
Habitat: on rock walls; alt. unknown.
Distribution: endemic to China.

Specimens Examined     (Last Modified On 5/5/2009)
Specimens Examined:
Chinese specimens examined: Nei Mongol: Ning-cheng Co., X.-L. Bai 2237 (HIMC). Yunnan: Yi-liang Co., S.-K. Chen 78-39 (HKAS).

Notes     (Last Modified On 5/5/2009)
general taxon notes:
Brachythecium perscabrum is similar to B. populeum (Hedw.) Schimp., but the latter differs by its stronger costae (ending in leaf acumen), its unconstricted leaf bases, and its smooth lower setae (only papillose in the upper part).


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23. Brachythecium perscabrum Broth.   疣柄青藓   you bing qing xian
Symb. Sin. 4: 107. 1929. Type: China. Yunnan, Salwin, Handel-Mazzetti 9368 (holotype H).
Plants small, slender, soft, yellowish green, somewhat glossy, in loose mats. Stems prostrate, to 2 cm long, irregularly branched, branches to 1.0 cm long, simple or with branchlets. Stem leaves broadly ovate, 1.0–1.4 mm × 0.57–0.61 mm, shortly acuminate, often twisted at apex; margins nearly entire or serrulate near leaf apex; costae stout, ending just above mid-leaf; median leaf cells linear, 70–86 µm × 5–7 µm; alar cells markedly differentiated, extending close to costa at leaf base, clearly decurrent at base; branch leaves ovate-lanceolate, 1.0–1.4 mm × 0.36–0.41 mm, slenderly acuminate at apex, strongly constricted, somewhat decurrent at base; margins serrulate near leaf apex, entire below. Autoicous. Setae ca. 15–18 mm long, papillose throughout; capsules ellipsoidal, often curved, dark brown; peristome double; exostome teeth lanceolate, 500 µm high, 81 µm wide at base, trabeculate above, cross-striolate below; endostome segments linear, as long as exostome teeth; basal membrane high; cilia long, nearly as long as the segments. Spores not seen.
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