Hypotrachyna Lichen

Hypotrachyna prolongata

Parmelia prolongata Kurokawa in Hale and Kurokawa, 1964: 182. [Type collection: Pic Macaya, Sud, Haiti, Wetmore 3233 (MSC, holotype; US, isotype).]

Thallus adnate to loosely adnate, mineral gray, 5–10 cm in diameter; lobes sublinear, 1.5–4 mm wide; upper surface plane, shiny, faintly maculate, sparsely lobulate-isidiate along the margins, the “isidia” in part lobulate, sometimes branched, 2–3 mm long; lower surface densely rhizinate. Apothecia not seen.

CHEMISTRY.—Cortex K+ yellow, medulla K−, C+ red, P− (atranorin and an unidentified C+ substance).

DISTRIBUTION.—Haiti.

HABITAT.—On pine trees at about 2000 m elevation.