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Published In: Journal of Science of the Hiroshima University, Series B, Division 2 (Botany) 8: 13. 1957. (J. Sci. Hiroshima Univ., Ser. B, Div. 2, Bot.) Name publication detail

Project Name Data (Last Modified On 4/2/2009)
Acceptance : Accepted
Project Data     (Last Modified On 5/6/2009)
General Reference:

Illustration & Map     (Last Modified On 5/6/2009)
Illustrations: Hypnum densirameum Ando (Figs. 1–12.)
Map: Hypnum densirameum Ando (Distribution in China)

Distribution     (Last Modified On 5/6/2009)


Habitat: on thin soil over rocks in forests; alt. 700 m.
Distribution: China and Japan.


Specimens Examined     (Last Modified On 5/6/2009)
Specimens Examined:
Chinese specimen examined: Shaanxi: Cheng-gu Co., M.-X. Zhang & J.-Z. Zhang 974 (XBGH). P.-C. Chen et al. (1978) reported Hypnum densirameum from Nei Mongol. However, this record could neither be verified by X.-L. Bai (1997) in the bryoflora of Nei Mongol nor by the present study. The present species was also reported from Taiwan by Iwatsuki (1969) and S.-H. Lin (1988).

Notes     (Last Modified On 5/6/2009)
general taxon notes:
Hypnum densirameum is characterized by its autoicous sexual condition, densely pinnately branched stems, triangular-lanceolate to elliptical-lanceolate leaves, ellipsoidal and arcuate capsules, and mammillose-rostrate opercula. It is close to Hypnum fauriei, but differs by having soft, densely and slenderly pinnately branched stems, stem leaves with alar cells mixed with a few smaller, subquadrate and few larger, hyaline cells, and shorter capsules not beyond 2.3 mm long; while in H. fauriei, the capsules are usually over 2.3 mm long.


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5. Hypnum densirameum Ando   密枝灰藓   mi zhi hui xian
J. Sci. Hiroshima Univ., Ser. B, Div. 2, Bot. 8: 13. 1957. Type: Japan. Honshu, Pref. Hiroshima, Ando 21224.
Plants soft, slender, brownish green, in dense mats. Stems prostrate, up to 10 cm long, radiculose; in stem cross section epidermal cells not hyaline and inflated, outer cortical cells 4–6 layers, dark brown, medullar cells large, hyaline, central strand well developed; densely pinnately branched, flattened, branches 3–5 cm long; pseudoparaphyllia lanceolate. Stem leaves falcate-secund, triangular-lanceolate to oblong ovate-lanceolate, 1.6–2.0 mm × 0.55–0.72 mm, slenderly acuminate at apex; margins recurved near the leaf bases, entire, except serrulate near the apex; costae double, distinct; median leaf cells very linear, 50–70 µm × 2–3 µm, thick-walled; basal cells thick-walled, brownish, porose; alar cells lax, hyaline, small, subquadrate, with 3–5 rows of cells at margins; branch leaves smaller, 1.3–1.7 mm × 0.3–0.4 mm, narrowly lanceolate, falcate-secund or circinate, alar cells distinctly differentiated. Autoicous. Inner perichaetial leaves lanceolate, plicate, slenderly acuminate ending with a filiform, serrulate apex; costae double, distinct. Setae 3.5–4.0 cm long, smooth, pale brownish, twisted when dry; capsules horizontal, ellipsoidal, arcuate, 1.5–2.0 mm long, pale green to pale brown, wrinkled when dry; opercula conic, bluntly apiculate, mammillose-rostrate; annuli developed, in 2–3 rows; peristome typically hypnoid, with 2–3 cilia. Calyptrae not seen. Spores 14–17 µm in diameter, very minutely roughened.
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