Hypotrachyna exsplendens (Hale) Hale

Hypotrachyna exsplendens

Parmelia exsplendens Hale in Hale and Kurokawa, 1964:174. [Type collection: Murdock’s Gap, Blue Mountains, Jamaica, Imshaug 15306 (MSC, holotype; US, isotype).]

Thallus adnate on bark, tannish mineral gray, 4–8 cm broad; lobes short, sublinear, 1.5–2.5 mm wide; upper surface plane, shiny, strongly white-maculate, sorediate, the soralia subterminal, capitate; lower surface densely rhizinate, the rhizines densely dichotomously branched. Apothecia not seen.

CHEMISTRY.—Cortex K+ yellow, medulla K−, P−, C−, KC+ rose (atranorin, alectoronic acid, and α-collatolic acid).

DISTRIBUTION.—Mexico, West Indies, Guatemala, Costa Rica, South Africa.

HABITAT.—On trees in evergreen forests at 900–1200 m elevation.