Leptodontium pungens Kindberg 1888

Leptodontium pungens

Leptodontium pungens (Mitt.) Kindb., Enum. Bryin. Exot. 63, 1888.

Didymodon pungens Mitt., J. Linn. Soc., Bot. 7:150, 1863. [Original material: Cameroons Mt., Cameroon, coll. Mann, 1862 (NY).]

Leptodontium acutifolium Mitt., J. Linn. Soc., Bot. 12:51, 1869. [Original material: Volcán de Fuego, Guatemala, coll. Godman & Salvin, s.n. (NY).]

Leptodontium braunioides C. Müll., Linnaea 42:325, 1879. [Original material: Mts. between Siambon & Tafí, Tucumán, Argentina, coll. Lorentz, 1873.]

Leptodontium matucanense Besch., Bull. Soc. Bot. France 32:58, 1885. [Original material: Matucana, Peru, coll. Savatier n. 1210.]

Leptodontium grimmioides C. Müll. ex. Britt., Bull. Torr. Bot. Club 23:474, 1896. [Original material: Sorata, La Paz, Bolivia, coll. Rusby n. 3192 (NY).]

Leptodontium subgrimmioides Broth. & Thér., Bull. Acad. Int. Geogr. Bot. 16(196):40, 1906. [Original material: Bogotá, Colombia, coll. Apollinaire-Maria n. 1 [H).]

Leptodontium acutissimum Bartr., Bull. Brit. Mus. Nat. Hist., Bot. 2:54, 1955. [Original material: Pichincha, Ecuador, coll. Bell. n. 413.]

Leptodontium skottsbergii Bartr., Ark. Bot., ser. 2, 4:33, 1959. [Original material: Las Torres, Mas Afuera, coll. C. & I. Skottsberg n. M159 (FH!).]

Stems in rather dense mats, 2–5 cm long, without tomentum, in section showing enlarged, usually collapsed, epidermal cells. Leaves only slightly twisted when dry, spreading-recurved from rather sheathing bases when wet, 3–4 mm long, 1.0–1.3 mm wide, lanceolate, carinate distally with narrowly acute apex; lower margins recurved, dentate in upper 1/3–1/2; costa percurrent to subpercurrent, semicircular in section with 4 guide cells, 2–3 rows of stereid cells abaxially; upper leaf cells subquadrate, 11–15 μm in diameter, with crowded, multifid papillae scattered over surface; apical cells mostly rhomboidal, scarcely papillose; inner basal cells 9–11 μm wide, 45–65 μm long, scarcely papillose; alar cells often yellowish brown with short, thick-walled cells. Setae 10–11 mm long, brown. Peristome 0.3–0.4 mm long. Spores 17–20 μm in diameter.

MAS AFUERA: Las Torres, ca. 1350 m, Sk. M159 (type, FH).

The species is also known from Mexico, Central America, Andes south to Argentina, southern Brazil, and the mountains of Africa. Juan Fernandez is the southernmost known locality for the species.

Leptodontium pungens là một loài Rêu trong họ Pottiaceae. Loài này được (Mitt.) Kindb. mô tả khoa học đầu tiên năm 1888.