Acrocladium auriculatum Mitten 1869

Acrocladium auriculatum

Acrocladium auriculatum (Mont.) Mitt., J. Linn. Soc. Bot. 12:532, 1869.

Hypnum auriculatum Mont., Ann. Sc. Nat. Bot. ser. 2, 19:240, 1843. [Original material: Straits of Magellan, Tierra del Fuego, coll. M. Jouquinot (PC).]

Yellowish green plants growing on organic substrate, with stems rather erect to 10 cm long, central strand very small. Leaves 2 mm long, 1.5–2.0 mm wide, broadly oblong-cordate with auricles up to 1/2 basal width, concave; margins incurved above, plane and subserrate on auricles, erect and scarcely crenulate at tip; costa slender, up to 1/4 leaf length; most cells of lamina 4–5 μm wide, mostly 40–60 μm long, linear, slightly sinuous; grading into 2–3 rows of short cells along rounded apex that are ca. 10 μm long; inner basal cells to 10 μm wide, with thicker porose walls; large area of inflated alar cells rather sharply demarcated, cells to 30 μm wide and 40 μm long, thin-walled; 2 rows of small, narrow, incrassate cells at alar margin. Autoicous. Setae 2–4 cm long, slender. Capsule urn ca. 2.5 mm long, quite curved when dry; spores 12–17 μm in diameter, nearly smooth.

MAS AFUERA: Trail to Los Innocentes, ca. 3000 ft, H. & E. 725.

The species is restricted to southern South America and adjacent islands. It has not been previously reported from Juan Fernandez. The capsule is not as erect as shown in most illustrations.

Acrocladium auriculatum là một loài Rêu trong họ Amblystegiaceae. Loài này được (Mont.) Mitt. mô tả khoa học đầu tiên năm 1869.