Hypotrachyna protoboliviana (Hale) Hale

Hypotrachyna protoboliviana

Parmelia protoboliviana Hale, 1974b:267. [Type collection: Volcán Irazú, Cartago, Costa Rica, Flenniken 1874 (US).]

Thallus adnate on bark, rather fragile, about 8 cm in diameter, light yellowish green; lobes more or less sublinear, short, 4–5 mm wide; upper surface smooth, without isidia or soredia; lower surface densely rhizinate, the rhizines densely dichotomously branched. Apothecia poorly developed, about 1 mm in diameter; spores lacking.

CHEMISTRY.—Cortex K−, medulla K−, C+ orange, P− (usnic acid, barbatic acid, 4-O-de-methylbarbatic acid, obtusatic acid, and norobtusatic acid).

DISTRIBUTION.—Costa Rica.

HABITAT.—On trees in open forest at about 3200 m elevation.