Hypotrachyna contradicta (Hale) Hale

Hypotrachyna contradicta

Parmelia contradicta Hale, 1974b:265. [Type collection: Teresópolis, Rio de Janeiro, Brazil, Watson 521 (BM, holotype; US, isotype).]

Thallus loosely attached on rock, rather coriaceous, whitish mineral gray; lobes linear and elongate, dichotomously branched, 1.5–2.0 mm wide, lacking soredia and isidia; upper surface plane and shiny; lower surface black, sparingly rhizinate, the rhizines coarse, sparsely dichotomously branched. Apothecia abundant, adnate, 2–4 mm in diameter; spores 4μ × 6μ.

CHEMISTRY.—Medulla K−, P+ orange-red (atranorin and protocetraric acid).

DISTRIBUTION.—Southeastern Brazil.

HABITAT.—On open sandstone outcrops at about 1000 m elevation.