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Published In: Bryotheca Baltica 34. 1908. (Bryoth. Balt.) Name publication detail

Project Name Data (Last Modified On 2/19/2009)
Acceptance : Accepted
Project Data     (Last Modified On 5/12/2009)
General Reference:

Illustration & Map     (Last Modified On 5/12/2009)
Illustrations: Calliergon megalophyllum Mikut. (Figs. 10–17.)
Map: Calliergon megalophyllum Mikut. (Distribution in China)

Distribution     (Last Modified On 5/12/2009)
Habitat: on soil in nutrient-rich lakes, mixed with Drepanocladus; alt. unknown.
Distribution: China, Russia, Europe, and North America.

Specimens Examined     (Last Modified On 5/12/2009)
Specimens Examined:
Chinese specimens examined: Heilongjiang: Yichun City, C. Gao 310 (IFSBH). Nei Mongol: Da Xing An Ling (Mt.), H.-J. Meng 561 (IFSBH).

Notes     (Last Modified On 5/12/2009)
general taxon notes:

Calliergon megalophyllum differs from other species of Calliergon by its large, robust plants.


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3. Calliergon megalophyllum Mikut.  圆叶湿原藓   yuan ye shi yuan xian 

Bryoth. Balt. 34. 1908. Calliergon richardsonii var. megalophyllum (Mikut.) Meylan, Ber. Schweiz. Bot. Ges. 50: 497. 1940. Type: Europe.
Plants usually rather robust, dark green, glossy. Stems prostrate, up to 20–35 cm long, more or less pinnately branched; stem round or pentagonal in cross section, cortical cells small, somewhat incrassate, in 2–3 layers, central strand present; pseudoparaphyllia large, foliose. Stem leaves large, 5–6 mm × 4–5 mm, erect-spreading, concave, oblong-ovate, obtuse, abruptly narrowed, not or slightly decurrent at base; costae single, thin, extending to 4/5 the leaf length or subpercurrent; median leaf cells linear-rhomboidal, 40–70 μm × ca. 5 μm, shorter, wider toward apex, with well-defined apical cells; alar cells hyaline, inflated, round-hexagonal to rectangular, forming a sharply delimited group, usually extending across 1/2 the leaf base. Sporophytes not seen.
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