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Moss China | Family List | Moss China V. 1 | Dicranaceae | Dicranella

13. Dicranella rufescens (With.) Schimp., Coroll. Bryol. Eur. 13. 1856; Bryum rufescens With., Syst. Arr. Brit. Pl. (ed. 4) 3: 801. 1801.

Plants small and slender, up to 7 mm high, dull, brownish or reddish brown, gregarious or in loose tufts. Stems erect, simple or branched. Leaves erect-spreading to subsecund, linear-lanceolate, lower ones shorter and rather distant, 0.8–1.0 mm long, upper ones longer and more crowded, up to 1.5 mm long, gradually narrowed to a more or less keeled acumen, acute at the apex; margins plane, crenulate above the shoulder, becoming serrulate near the apex; costa stout, subpercurrent to short-excurrent, occupying ca. 1/5 the leaf base width; upper cells long-rectangular, 40–50 µm × 8–14 µm, a row of marginal cells slightly enlarged. Dioicous. Perichaetial leaves larger, costa long-excurrent from a subulate acumen. Setae straight, 4–5 mm long, reddish brown; capsules short-cylindric, 0.3–0.4 mm × 0.2 mm, erect, symmetric or nearly so, smooth when dry; opercula stoutly rostrate, nearly as long as the urns or slightly shorter; annuli absent; peristome teeth lanceolate, ca. 350 µm long, slightly spreading when dry, divided about 1/3 – ½ down to the base. Spores 14–18 µm in diameter, nearly smooth.

Type. Scotland.

Chinese specimens examined: JIANGXI: Lu Shan (Mt.), Y.-S. Yang 33035 (IFSBH).

Habitat: on wet soil of roadbanks; Distribution: China, Alaska, Europe, and North America.

Illustrations: Crum & Anderson 1981 (Fig. 71, G–K).


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