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 Primary thallus: squamulose, persistent; squamules: 1-4 mm long, 1-2 mm wide, crenulately lobate along margins, greenish-gray with bluish tinge, sometimes with pruina toward lobe tips; podetia: 5-35 mm tall, up to 8 mm wide, branched, twisted from the base upward, fissured longitudinally along the length; branches: anastomosing, without cups; surface: mostly corticated; cortex: continuous or breaking up and disappearing in places, esorediate; Apothecia: constantly present from early stages, chestnut brown to darker, larger than podetial support, solitary; ascospores: ellipsoid, 10.5-18 x 3.5-5.5 micro meter; Pycnidia: uncommon, on primary squamules or on tiny appressed podetial squamules, obconical, with hyaline jelly; conidia: 0.5-1 x 3-4 micro meter; Spot tests: K+ yellowish changing to dingy brown or K+ persistent yellow, C-, KC-, P+ deep yellow, rarely changing to red, or P-, UV-; Secondary metabolites: atranorin only or with additional fumarprotocetraric acid (as minor substance).; Habitat and ecology: on thin soil and roadcuts, usually in damp microhabitats; World distribution: Asia, Europe, North America and South America (south), mainly temperate, western North America; Sonoran distribution: common in Arizona at mid to high elevations. 


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© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

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