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Psora tuckermanii R. Anderson ex Timdal
Family: Psoraceae
Psora tuckermanii image
Stephen Sharnoff  
Squamules: up to 6 mm wide, elongate, imbricate, weakly concave to weakly convex upper surface: light brown or medium brown, dull, epruinose or partly pruinose, smooth or sparingly fissured margin: concolorous with upper side or white, down-turned or straight, entire or lobed upper cortex: up to 60-120 µm thick, composed of thin-walled hyphae with round lumina, not containing crystals of lichen substances, sometimes containing calcium oxalate medulla: not lichen substances, often containing calcium oxalate lower cortex: of mainly periclinally oriented hyphae, not containing calcium oxalate lower surface: white to medium brown Apothecia: up to 1.5 mm diam., laminal, convex and immarginate even when young, medium brown, epruinose or white or yellow pruinose ascospores: broadly ellipsoid, 8-11 x 6-8 µm Pycnidia: unknown Spot tests: upper cortex and medulla K-, C-, KC-, P- Secondary metabolites: none detected. Substrate and ecology: on soil and rock in open habitats, mainly in pinyon-juniper woodland, conifer forests, and Great Basin desert scrub, from 750 m to 2860 m alt. but rare below 1600 m World distribution: western North America Sonoran distribution: common in northern and central Arizona, scattered to rare in southern Arizona and California. Notes: The specimens from Mexico and most of the specimens from southern California reported by Timdal (1986) are now considered belonging in P. luridella.
Psora tuckermanii image
Stephen Sharnoff  
Psora tuckermanii image
Stephen Sharnoff  
Psora tuckermanii image
Stephen Sharnoff  
Psora tuckermanii image
Stephen Sharnoff  
Psora tuckermanii image
Stephen Sharnoff  
Psora tuckermanii image
Stephen Sharnoff  
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image
Psora tuckermanii image