Pleuridium robinsonii Mitten 1869

Pleuridium robinsonii

Pleuridium robinsonii (Mont.) Mitt., J. Linn. Soc., Bot. 12:26, 1869.

Phascum nervosum var. robinsonii Mont., Ann. Sc. Nat. Bot. ser. 2, 4:96, 1835. [Original material: Mas a Tierra, coll. Bertero, 1830 (PC).]

Small, loose tufts of scattered, erect stems to 5 mm high, pale yellowish. Stems unbranched, julaceous with appressed, small leaves, leaves larger near the fertile tips. Vegetative leaves ca. 0.5 mm long, 0.3–0.4 mm wide, broadly oval, strictly short-acute; distal margins minutely, closely serrulate by projecting ends of narrow, outward pointed cells; costa broad, percurrent, lamina cells 25–40 μm long, 7–10 μm wide. Perichaetial leaves up to 2 mm long, obovate with long, acuminate tip, costa subpercurrent, median cells to 60 μm long, basal cells very enlarged and oblong. Capsule immersed on very short seta, often emerging to one side at maturity, ca. 1 mm long.

MAS A TIERRA: Without precise locality, O. Jenz n. 36.

The species is found also in central Chile and in Uruguay. This is the only moss of the inoperculate “pygmy” type known from Juan Fernandez.

Pleuridium robinsonii là một loài rêu trong họ Archidiaceae. Loài này được Mont. Mitt. mô tả khoa học đầu tiên năm 1869.