Hypotrachyna novella (Vain.) Hale

Hypotrachyna novella

Parmelia novella Vainio, 1890:56. [Type collection: Sitio, Minas Gerais, Brazil, Vainio 1028 (TUR, lectotype; BM, FH, M, isolectotypes).]

Parmelia brasiliana var. novella (Vainio) Lynge, 1914:115. Parmelia regis Lynge, 1914:126. [Type collection: São Paulo d’el Rey, Minas Gerais, Brazil, Malme 178 (S, lectotype; UPS, isolectotype).]

Thallus closely adnate on bark, tannish mineral gray, 2–4 cm broad; lobes sublinear, crowded, 1–2.5 mm wide; upper surface plane, continuous, darkening toward the center; lower surface black, densely rhizinate, the rhizines densely dichotomously branched. Apothecia common, adnate, 2–7 mm in diameter, the amphithecium crenulate; spores 6μ × 12μ.

CHEMISTRY.—Cortex K−, medulla K−, C+ rose or C−, P− (lichexanthone, colensoinic acid, norcolensoinic acid, 4-O-demethylphysodic acid, lividic acid, physodic acid, and associated unknown substances).

DISTRIBUTION.—Venezuela and southeastern Brazil.

HABITAT.—On trees in open forests at 1000–2000 m elevation.