Comprehensive Description
provided by Smithsonian Contributions to Botany
Hypotrachyna osorioi
Parmelia osorioi Hale, 1974b:266. [Type collection: Abra de Cotto, Lavalleja, Uruguay, Osorio 6507 (MVM, holotype; US, isotype).]
Thallus loosely adnate on rock, fragile, light tannish mineral gray, about 8 cm in diameter; lobes sublinear, about 2 mm wide; upper surface plane, continuous, coarsely isidiate, isidia simple and cylindrical to coralloid-branched, apically breaking down and almost pustulate or sorediate, dense with age; lower surface moderately rhizinate, rhizines moderately dichotomously branched. Apothecia rare, adnate, 3–7 mm in diameter; spores 6μ × 12μ.
CHEMISTRY.—Cortex K+ yellow, medulla K−, C+ red, P− (atranorin and gyrophoric acid).
DISTRIBUTION.—Uruguay.
HABITAT.—On stones in open forest at less than 1000 m elevation.
- bibliographic citation
- Hale, Mason E., Jr. 1975. "A Revision of the Lichen Genus Hypotrachyna (Parmeliaceae) in Tropical America." Smithsonian Contributions to Botany. 1-73. https://doi.org/10.5479/si.0081024X.25
