Hypotrachyna peruviana (Nyl.) Hale

Hypotrachyna peruviana

Parmelia peruviana Nylander, in Crombie, 1876:228. [Type collection: Tatanara, Peru, Lechler 2727 (H, lectotype; BM, G, M, P, S, UPS, isolectotypes).]

Thallus loosely adnate on bark, rather fragile, 4–7 cm in diameter; lobes short, sublinear, 2–6 mm wide; upper surface plane to rugulose, faintly maculate, lacking isidia and soredia; medulla pale chalcedony yellow; lower surface densely rhizinate, the rhizines 1–2 mm long, dichotomously branched. Apothecia conspicuously stipitate to columnar, 3–6 mm high, 2–5 mm in diameter, the amphithecium rugose; spores 7μ–12μ × 11μ–18μ.

CHEMISTRY.—Cortex K+ yellow, medulla K+ yellowish, C+ orange (atranorin, barbatic acid, obtusatic acid, entothein, and unidentified pigments).

DISTRIBUTION.—Peru and Brazil.

HABITAT.—On trees in open forests at 1000–1500 m elevation.