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Lecanora oreinoides (Korber) Hertel & Rambold (redirected from: Lecidea tennessensis)
Family: Lecideaceae
[Aspicilia oreinoides Körb.,  more]
Lecanora oreinoides image
Stephen Sharnoff  
Thallus: crustose, rimose-areolate, forming an irregularly rounded patch usually 2-5 cm across and up to 0.4 mm thick; prothallus: thin, black, sometimes visible between the areoles or along the thallus margin especially at the juncture of a different thallus, areoles: usually contiguous, becoming almost bullate, plane to convex, ecorticate surface: white to grayish white, cream-colored or pale yellow, smooth, shiny to dull, esorediate Apothecia: immersed in center of the areoles, 1-3 per areole, up to 0.5 mm in diam. disc: black, flat to slightly convex, sometimes with a dusting of white pruina margin: usually flat and continuous with the areole surface, up to 0.7 mm wide, without a parethecial ring parathecium: yellowish ochre, 10-20 µm wide epihymenium: dark olive green to bluish green, 10-15 µm thick hymenium: hyaline, 35-55 µm tall; paraphyses: unbranched, rarely anastomosing, below 1.5-2 µm wide, terminally globose up to 3.5 µm wide; subhymenium: hyaline; hypothecium: hyaline asci: clavate, I+ blue, c. 8-spored ascospores: hyaline, simple, ellipsoid, (7-)9-14 x 4-6.5(-7.5) µm Pycnidia: immersed conidia: hyaline, filiform, 10-16 x c. 0.8 µm Spot tests: cortex K+ yellow, C-, KC-, P+ yellow; medulla K-, C-, KC-, P- Secondary metabolites: upper cortex with atranorin and chloroatranorin, medulla with confluentic (major) and 4O-methylmicrophyllinic (minor) acids. Substrate and ecology: on a range of different acidic rocks in open to partially shaded habitats at intermediate elevations World distribution: temperate regions of North and South America, Africa, eastern Asia, Australasia and Oceania and extending towards the tropics in mountainous regions Sonoran distribution: common throughout the region at intermediate elevations in Arizona, Chihuahua, Sonora, Sinaloa and Baja California Sur. Notes: Superficially L. oreinoides is similar to some species of Buellia, which can be readily separated by their brown, 1-septate spores. At first glance L. oreinoides is also similar to L. subimmersa (below), but the latter species has an even flatter thallus surface, brown disc, somewhat smaller spores and a different medullary chemistry. Lecanora oreinoides differs from similar lecideoid species with white or pale yellow thalli by having apothecia mostly under 0.5 mm in diam. and by lacking usnic acid.
Lecanora oreinoides image
Gary Perlmutter  
Lecanora oreinoides image
Gary Perlmutter  
Lecanora oreinoides image
Stephen Sharnoff  
Lecanora oreinoides image
Lecanora oreinoides image
Lecanora oreinoides image
Lecanora oreinoides image
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Lecanora oreinoides image
Lecanora oreinoides image
Lecanora oreinoides image
Lecanora oreinoides image
Lecanora oreinoides image
Lecanora oreinoides image