Macromitrium fernandezianum Brotherus ex Skottsberg 1924

Macromitrium fernandezianum

Macromitrium fernandezianum Broth. in Skottsb., Nat. Hist. Juan Fernandez 2:422, 1924. [Original material: Mas a Tierra, Puerto Ingles, ca. 550 m, coll. C. & I. Skottsberg n. 168 (lectotype, present designation; S!).]

Bright green to brownish plants with erect branches to 5 mm high. Leaves irregularly contorted or twisted spirally around stem when dry, erect-spreading when moist, 2.0–2.5 mm long, to 0.4 mm wide, narrowly lanceolate from an oval base, narrowed to 0.1 mm wide near tip; margins plane to slightly recurving, crenulate to serrulate; tip usually narrowly rounded with small teeth and a long, projecting, papillose apical cell; costa subpercurrent, covered with many rounded cells abaxially in distal 1/5; cells of upper lamina rounded, 10–12 μm in diameter, with somewhat thickened walls, mamillose and weakly papillose; inner basal cells oval, to 20 μm long; those toward margin linear, to 40 μm long, many bearing a high, cylindrical papilla. Pseudoautoicous? Setae 3–5 mm long, reddish, smooth. Capsule urn oval, ca. 1.0 mm long, smooth; mouth somewhat puckered when dry, more reddish brown; peristome lacking? Spores 20–25 μm in diameter, finely papillose. Calyptra bare.

MAS A TIERRA: El Yunque, 400–500 m, Sk. 166 (S); Puerto Ingles, ca. 500 m, Sk. 168 (lectotype, S); Salsipuedes, Sk. 169 (S); Portezuelo de Villagra, ca. 600 m, Sk. 170 (S); Puerto Frances, Lorna Incienso, Sk. 172 (S); Valle Colonial, near trail to Portezuelo de Villagra, ca. 220 m, Sk. M6 (S); Falda Larga (Q. Minero), Sk. M60 (S); La Vaguería, Sk. M62 (S); Cerro Pascua, eastern end, Sk. M76 (S); forest above Plazoleta del Yunque, 400–450 m, Sk. M245, M246, M253 (S); Vaquería, slope of Cerro Alto, Sk. M257 (S), Sk. M260 (S); Portezuelo (Mirador), 500 m, K. 308/31, 308/32a (B); Q. östl. Plazoleta, 300 m, K. 322/13 (B); trail to Camote, 500 m, K. 330/13a, 330/15 (B); Plazoleta del Yunque, 220 m, K. 332/1a, 332/2 (B); Cordon Salsipuedes, ca. 1700 ft, H. & E. 345.

The species is endemic to Mas a Tierra. Being epiphytic, it probably is less common now than formerly. Macromitrium masafuerae, which follows, is a closely related species, and the group may well have evolved on the islands.

Macromitrium fernandezianum là một loài rêu trong họ Orthotrichaceae. Loài này được Broth. mô tả khoa học đầu tiên năm 1924.