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Published In: Hikobia 8: 48. 1977. (Hikobia) Name publication detail

Project Name Data (Last Modified On 3/27/2009)
Acceptance : Accepted
Project Data     (Last Modified On 5/5/2009)
General Reference:

Illustration & Map     (Last Modified On 5/5/2009)
Illustrations: Helicodontium doii (Sakurai) Taoda (Figs. 1–11.)
Map: Helicodontium doii (Sakurai) Taoda (Distribution in China)

Distribution     (Last Modified On 5/5/2009)


Habitat: on bark of trees and rotten logs in broad-leaved forests; alt. 2500–2800 m.
Distribution: China and Japan.

Specimens Examined     (Last Modified On 5/5/2009)
Specimens Examined:
Chinese specimens examined: Sichuan: Du-kou City, L.-S. Wang 83-304 (HKAS). Yunnan: Meng-hai Co., X.-J. Li 850008 (HKAS).


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1. Helicodontium doii (Sak.) Taoda   大旋齿藓 da xuan-chi xian
Hikobia 8: 48. 1977. Schwetschkea doii Sak., Bot. Mag. (Tokyo) 46: 498. 1932. Type. Japan: Pref. Kagoshima, Mt. Jisso, Sakurai 2701.
Helicodontium robustum (Toy.) Shin, Sci. Rep. Kagoshima Univ. 32: 85, 9. 1. 1954. Schwetschkea robusta Toy., Acta Phytotax. Geobot. 6: 176. 5. 1937.
Plants slender, yellowish green or dark green, not glossy, in plane interwoven patches. Stems prostrate, irregularly branched; branches short, erect or erecto-patent, rarely secondarily branched; rhizoids sparse. Branch leaves erecto-patent, appressed when dry, ovate-lanceolate, acuminate above, 1.0–1.7 mm long; leaf margins plane, entire below, slightly serrulate near leaf apex; costa single, weak, ending at 2/3 the leaf length; leaf cells s-shaped linear, 45–75 µm × 6–8 µm, smooth; apical leaf cells short-rhomboidal; alar cells quadrate, in several rows, clearly differentiated. Autoicous. Setae 5–7 mm long, papillose; capsules ovoid, suberect; peristome double, equal in length; exostome teeth lanceolate, papillose above, densely striate in the middle and below; endostome segments linear; basal membrane low; cilia absent. Spores 10–15 µm in diameter.
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