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Published In: Revue Bryologique 53: 3. 1926. (Rev. Bryol.) Name publication detail

Project Name Data (Last Modified On 4/1/2009)
Acceptance : Accepted
Project Data     (Last Modified On 5/6/2009)
General Reference:

Illustration & Map     (Last Modified On 5/6/2009)
Illustrations: Plagiothecium formosicum Broth. & Yasuda (Figs. 1–8.)
Map: Plagiothecium formosicum Broth. & Yasuda (Distribution in China)

Distribution     (Last Modified On 5/6/2009)
Habitat: on soil and rotten wood; alt. 2700–3350 m.
Distribution: endemic to China.

Specimens Examined     (Last Modified On 5/6/2009)
Specimens Examined:
Chinese specimens examined: Fujian: Mt. Wuyi, P.-C. Chen et al. 278 (PE). Shaanxi: Mt. Taibai, Z.-P. Wei 6199 (WUK). Sichuan: Yan-yuan Co., M.-Z. Wang 22423 (PE). Xizang: Mi-lin Co., M. Zang 1972 (HKAS). Yunnan: Gong-shan Co., M.-Z. Wang 11409b (PE); Yun-long Co., X.-S. Cun 2 (HKAS), Handel-Mazzetti 650 (H).

Notes     (Last Modified On 5/6/2009)
general taxon notes:

Plagiothecium formosicum var. formosicum is similar to P. laetum, but it differs by the poorly developed central strand, the arch-curved leaves, and the dioicous sexuality.


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5. Plagiothecium formosicum Broth. & Yasuda   台湾棉藓   tai wan mian xian
Rev. Bryol. 53: 3. 1926. Type: China. Taiwan, Mt. Daibu, Matsuda s.n.
5a. Plagiothecium formosicum var. formosicum   台湾棉藓原变种   tai wan mian xian yuan bian zhong
Plants small to medium-sized, soft, grayish green or yellowish green, somewhat glossy, in dense mats. Stems prostrate, irregularly branched, leafy branches 5–10 mm × 2–3 mm, complanate; central strand weakly differentiated. All leaves soft, usually plicate, ovate-lanceolate, 1.3–1.6 mm × 0.50–0.55 mm, distinctly asymmetric, often arch-curved, gradually acute at apex; margins plane or narrowly reflexed, entire or serrulate near the apex; costae forked, unequal in length; median leaf cells linear-rhomboidal, 80–130 µm × 5–7 µm; apical cells shorter; basal cells rectangular, porose; alar regions narrowly decurrent, consisting of 4 rows of inflated, mostly rectangular cells. Brood bodies and rhizoids often present at leaf apex. Dioicous. Perichaetial leaves shortly ovate-lanceolate, often plicate, sheathing at base. Setae 15–22 mm long; capsules inclined to horizontal, shortly cylindrical, 1.5–2.0 mm long; opercula shortly conic-rostrate, with a short beak; annuli well developed, consisting of 2 rows of deciduous cells; stomata few; peristome double; cilia 2, nodulose. Spores 10–20 µm in diameter, nearly smooth.

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There are two varieties of this species found in China.

5a. Plagiothecium formosicum var. formosicum  

5b. Plagiothecium formosicum var. rectiapex D.-K. Li  



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