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 Thallus: adnate, foliose, 3-6 cm in diam., irregularly lobate; lobes: sublinear, elongate, moderately imbricate, elongate, plane to subconvex, separate, 0.5-2 mm wide; margin: sometimes lobulate; apices: subrotund with prominently inflated, dense, bulbate cilia; upper surface: pale gray to olive-gray (turning olive buff in the herbarium), smooth to rugose, shiny, white maculate; soredia, isidia and pustulae absent; medulla: white with continuous algal layer; lower surface: black, rhizinate; rhizines: moderately dense, black, simple to branched; Apothecia: common, laminal, 1-2.5 mm wide; disc: dark brown; margin: outer rim smooth, inner rim ecoronate; asci: clavate, 8-spored; ascospores: broadly ellipsoid, 7-8 x 5-6 µm; Pycnidia: not seen; Spot tests: upper cortex K+ yellow, C-, KC-, P+ yellow; medulla K-, C+ red, KC+ red, P-; Secondary metabolites: upper cortex with atranorin and chloroatranorin; medulla with gyrophoric acid (major).; Substrate and ecology: on small trees in open habitats; World distribution: neotropics, including Mexico, Colombia and Peru; Sonoran distribution: oak forests at intermediate elevations in Sonora. 


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© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

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