IUCN threat status:

Not evaluated

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Description

 Life habit: lichenized, lichenicolous or not; Thallus: squamulose; squamules: up to 3 mm diam., scattered to adjacent or irregularly imbricate, rounded or elongated, weakly convex to bullate; upper surface: olivaceous green to grayish green or olivaceous brown to grayish brown, epruinose to partly (rarely entirely) covered by farinose pruina, dull or faintly shiny, smooth or sometimes with a few shallow fissures, lacking pores and pseudocyphellae; upper cortex: up to 60 µm high, containing calcium oxalate; margin: concolorous with upper surface or white; Apothecia: up to 3 mm diam., plane and marginate when young, later convex and immarginate, epruinose or faintly pruinose or densely pruinose; exciple: dark gray in the rim, medium brown to dark reddish brown in inner part; hypothecium: reddish brown; epithecium: gray (K+ violet, N+ violet); asci: clavate, 8-spored; ascospores: fusiform, 1-septate, 12-24 x 3-5 µm; Pycnidia: not seen; Spot tests: all negative; Secondary metabolites: none detected in Sonoran material but some terpenoids found elsewhere.; Host: cyanolichens; Substrate and ecology: on soil and in fissures of often calciferous rock in open habitats and woodlands, up to 2380 m; World distribution: widely distributed throughout the Northern Hemisphere, more scattered in the Southern Hemisphere; Sonoran distribution: rather common in Arizona and California, rare in Baja California. 

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© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

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