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Xanthoparmelia weberi (Hale) Hale (redirected from: Parmelia weberi)
Family: Parmeliaceae
[Parmelia weberi Hale]
Xanthoparmelia weberi image
Stephen Sharnoff  
Thallus: foliose, adnate, 3-10 cm in diam., irregularly lobate lobes: subirregular, elongate, plane to subconvex, separate, contiguous to somewhat imbricate, (1-)2-3 mm wide, not lobulate; apices: subrotund, smooth to crenate, eciliate upper surface: yellow-green, smooth, shiny, epruinose and emaculate, moderately to densely isidiate isidia: abundant, initially globose, soon becoming cylindrical to irregularly inflated, 0.1-0.2 mm in diam., 0.1-0.8 mm tall; tips: epicorticate, dull brown, sometimes weakly erumpent; soralia and pustulae absent medulla: white, with continuous algal layer lower surface: pale tan or brown, rarely darkening, plane, moderately to densely rhizinate; rhizines: pale brown, simple, 0.2-0.5 mm long Apothecia: rare, substipitate, 2-4 mm wide, laminal on thallus; disc: cinnamon-brown to dark brown; margin: smooth, pruina absent asci: clavate, 8-spored ascospores: hyaline, simple, ellipsoid, 9-12 x 5-6 µm Pycnidia: rare, immersed conidia: bifusiform, 5-6 x 1 µm Spot tests: upper cortex K-, C-, KC-, P-; medulla K-, C-, KC-, P- Secondary metabolites: upper cortex with usnic acid (major); medulla with hypoprotocetraric acid (major) and 4-O-demethylnotatic acid (submajor). Substrate and ecology: on acidic rocks, rarely on wood, usually in open, arid habitats World distribution: The Arabian Peninsula, Africa and southwestern North America Sonoran distribution: common at lower elevations in Arizona, southern California, Baja California, Baja California Sur, Chihuahua, and Sonora. Note: Xanthoparmelia weberi is a broad lobed, globose isidiate species with a pale brown lower cortex and has hypoprotocetraric and 4-O-demethylnotatic acid in the medulla. It is one of the more common isidiate species in the interior deserts.
Xanthoparmelia weberi image
Joselyn Fenstermacher  
Xanthoparmelia weberi image
Joselyn Fenstermacher  
Xanthoparmelia weberi image
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Xanthoparmelia weberi image
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Xanthoparmelia weberi image
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