IUCN threat status:

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Description

 Thallus: crustose, dispersed into elements, up to 2.5 cm in diam.; upper surface: yellow or orange, covered with whitish pruina, with schizidia; upper cortex: paraplectenchymatous, 25-60 µm thick including a up to 35 µm thick epinecral layer; medulla: white, 40-160 µm; algal layer: indistinct, 25-150 µm thick, with scattered, algae cells dispersed through the whole medulla; lower cortex: absent; lower surface: gelatinized, with compressed hyhae; Apothecia: common, sessile, up to 1.5 mm in diam.; disc: flat, becoming convex or rarely concave in old ones; margin: smooth, brighter than disc; asci: clavate, 8-spored; ascospores: hyaline, 1-septate, ellipsoid, 10-15 x 4-7 µm; Pycnidia: unilocular or plurilocular; conidiophores branched or pseudoparenchymatous arranged; conidiogenous cells: terminally or intercalary arranged, acrogenous or pleurogenous, with "bayonet-like" projections; conidia: hyaline, simple, oblong, 3-3.5 x 1-1.2 µm; Secondary metabolites: anthraquinone pigments.; Substrate and ecology: soil and eroding sediments in dry habitats; World distribution: widely distributed in warm and dry areas of the Northern Hemisphere, also found in dry alpine valleys and in Norway; Sonoran distribution: one of the most common Fulgensia species in Arizona, southern California and 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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