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Peltula euploca (Ach.) Poelt
Family: Peltulaceae
[Dermatocarpon euplocum (Ach.) A.L. Sm.,  more]
Peltula euploca image
Stephen Sharnoff  
Thallus: peltate, scattered individually, sometimes lobed (rarely polyphyllous), up to 12 mm in diam.; margins: downrolled, not undulate upper surface: tan-olive-green to dark olive-brown, dull to shiny soredia: farinose, black, marginal (rarely laminal), in elongated soralia upper cortex: lacking but with a yellow to brownish epinecral layer (5-10 µm thick) medulla: composed of loosely interwoven hyphae (cells: elongated, 1.5-3 µm thick); algal layer: clearly delimited, 70-150 µm thick lower cortex: 18-90 µm thick, proso- to paraplectenchymatous, hyphae often anticlinally arranged; cells: globose to elongated, 3-8 µm thick lower surface: paler than the upper surface, attached by an umbilicus Apothecia: rare, many per squamule, immersed; disc: punctiform to widely expanded, 0.1-0.9 mm diam.; epihymenium: yellowish brown or pinkish, K-; hymenium: I+ wine-red, 105-220 µm high asci: clavate to obclavate; wall: I+ slightly blue and more strongly blue after pretreatment with K, 32-100-spored ascospores: ellipsoid to bacilliform, 6-9 x 3-4.8 µm Pycnidia: immersed, chambered, up to 150 µm diam. conidia: fusiform, 3-3.5 x 1-1.5 µm Spot tests: all negative Secondary metabolites: none detected. Substrate and ecology: on acidic rocks in deserts and other open, arid habitats World distribution: throughout arid and semi-arid regions on all continents and extending into temperate regions of North America, Eurasia and Australasia Sonoran distribution: desert to mountain areas of Arizona, southern California, Sonora, Sinaloa, Chihuahua Baja California and Baja California Sur.
Peltula euploca image
Stephen Sharnoff  
Peltula euploca image
Stephen Sharnoff  
Peltula euploca image
Stephen Sharnoff  
Peltula euploca image
Stephen Sharnoff  
Peltula euploca image
Stephen Sharnoff  
Peltula euploca image
Peltula euploca image
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Peltula euploca image
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Peltula euploca image
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Peltula euploca image