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Oncophorus fuegianus Cardot 1900

Comprehensive Description

provided by Smithsonian Contributions to Botany
Oncophorus fuegianus

Oncophorus fuegianus Card., Rev. Bryol. 27:39, 1900. [Original material: Lapataia River, Tierra del Fuego, coll. C. Skottsberg n. 16, 1902 (S!).]

Plants rather robust, to 3 cm high, yellowish green, brownish below, radiculose only at base. Leaves spreading from an erect sheathing base, only slightly crisped when dry, 3.0–3.5 mm long; base ca. 1.0 mm long, 1.0 mm wide, with flaring margins; blade lanceolate, narrowed apically to a blunt, toothed tip; margin erect, irregularly and coarsely serrate above the middle; costa percurrent, ca. 100 μm wide at base of blade, on both surfaces covered with small subquadrate cells 8–10 μm in diameter; cells of lamina and margin unistratose; cells of blade and shoulders subquadrate, 10–12 μm in diameter; upper cells more rounded, mostly 8–10 μm in diameter; inner and lower marginal cells of base narrow, elongate, mostly 50–130 μm long, mostly 12–15 μm wide, 10 or more rows nearer margin 8–10 μm wide, cell walls rather thin but firm. Sporophyte unknown.

MAS AFUERA: Q. Casa, Sk. 477 (S).

The three specimens in the herbarium at Stockholm seem to represent the known distribution of the species: the specimen above from Juan Fernandez, the type from Tierra del Fuego, and a third specimen from Río Aysen, Western Patagonia, Dusén n. 467, 1897, that was noted as equal to Dichodontium brotheri Dus. ex Par. nom. nud.
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bibliographic citation
Robinson, Harold E. 1975. "The mosses of Juan Fernandez Islands." Smithsonian Contributions to Botany. 1-88. https://doi.org/10.5479/si.0081024X.27