Orthotrichum euryphyllum Venturi ex Röll 1890

Orthotrichum euryphyllum Venturi: Roll,
Bot. Centr. 44: 417. 1890.
Loosely cespitose, 2-3 cm. high, dark green; stems erect, branching; leaves lanceolate from a broadly ovate base, the apex roundish, entire, or obtuse and slightly toothed, the upper 3.5 mm. long, 1-1.5 mm . broad, the lower smaller, the margins revolute nearly to the apex so that this is sometimes inversely cucullate ; costa ending far below the apex ; leaf-cells hexagonal, 12-16 n in diameter, their walls not thickened, reddish, the papillae single, minute, or wanting, the basal cells turgid, almost inflated, parenchymatous; autoicous; seta short; capsules immersed, thick, broadly ovate, when dry constricted under the mouth, abruptly narrowed to the seta, with 8 broad striae of 4-6 rows of cells ; calyptra naked, plicate ; stomata immersed in the neck of the capsule, almost covered by the bordering cells; annulus double or triple; operculum conic-apiculate, red at the margin; peristome double, the teeth 16, reddish, up to 0.5 mm. long, slender, with interrupted additional plates at the back, approximate in pairs, when dry radially spreading, each interruptedly cleft almost to the base in the middle line, papillose, the papillae minute and arranged in more or less regular lines, the segments 8, robust, as long as the teeth, papillose below, with occasionally 8 abortive intermediate segments; spores 16-19 p. in diameter.
Type locality: On stones, Ellensburgh, Washington (type material seen).
Distribution: Washington.

Orthotrichum euryphyllum là một loài Rêu trong họ Orthotrichaceae. Loài này được Venturi mô tả khoa học đầu tiên năm 1890.