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 Thallus: suffruticose, in patches up to 3 cm in diam.; squamules: up to 1.5 mm long, club-shaped; upper surface: dark olive-black to black; isidia: sometimes present, minute, laminal; not sorediate; upper cortex: lacking but with a yellow to brownish epinecral layer (3-6 µm thick); medulla: almost completely hollow; hyphae: peripheral, 1.5-2 µm thick, elongated, loosely interwoven; algal layer: delimited to the 30-50 µm thick outer part; lower cortex: not developed; Apothecia: (only known from Australian material) 1-3, immersed; disc: punctiform, up to 0.2 mm in diam.; asci: clavate, I+ wine-red but blue after pretreatment with K, >64-spored; ascospores: globose, 3.5-4.7 µm diam.; Pycnidia: no data available; conidia: fusiform, 3.7-4.3 x 1.2-1.8 µm; Spot tests: all negative; Secondary metabolites: none detected.; Substrate and ecology: on acidic rocks in arid woodlands; World distribution: SW North America, NE Brazil, southern Africa and northern Australia; Sonoran distribution: desert transition areas of SE Arizona. 

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© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

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