Chorisodontium aciphyllum Brotherus 1924

Chorisodontium aciphyllum

Chorisodontium aciphyllum (Hook. f. & Wils.) Broth., Nat. Pfl. ed. 2, 10:205, 1924.

Dicranum aciphyllum Hook. f. & Wils., London J. Bot. 3:541, 1844. [Original material: Hermite Isl., Cape Horn, and Falkland Isl., coll. J. D. Hooker, 1839–1843.]

Campylopus muricatus Dix., K. Norsk. Vid. Selsk. Forh. 4:180, 1932. [Original material: Near sea level, Maiviken, South Georgia, coll. Trøim, 1929.]

Slender, yellowish green plants in tufts with stems to 5 cm high. Leaves to 10 mm long, 1.1 mm wide, narrowly lanceolate; margin entire or sometimes with few apical teeth; cells of lamina ca. 10 μm wide, narrower near margin, lower leaf cells elongate to 100 μm, a few upper cells short-rectangular to rhomboidal, walls distinctly thick-walled and rather porose. Dioicous. Setae ca. 2.5 cm long. Capsule urn 2.5 mm long; peristome ca. 250 μm long, red; operculum 2.0 mm long.

MAS A TIERRA: Cordón Damajuana, above 650 m, K. M331 (S); 600 m, K. 328/17a in part (B).

The species is known from the southern tip of South America, the Falkland Islands, South Georgia, and the South Orkney Islands in addition to Juan Fernandez.