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Punctelia stictica (Duby) Krog
Family: Parmeliaceae
[Parmelia stictica (Duby) Nyl.]
Punctelia stictica image
Stephen Sharnoff  
Thallus: closely adnate, foliose, lobate lobes: sublinear, contiguous, plane, narrow, 1-2 mm wide, apices truncate upper surface: brownish gray to brown, especially towards the tips, smooth, never pruinose, but also at least partly marginal pseudocyphellae: numerous, conspicuous, white, round to usually elongate to somewhat branched, laminal, reaching 0.5 mm soredia: granular, irregular, grayish white, often with bluish gray discoloration, originating from pseudocyphellae, marginal and laminal, up to 0.4 mm in diam., but joining into larger, linear or irregularly shaped structures lower surface: usually black centrally, brown marginally; rhizines: concolorous with the lower cortex Apothecia: absent in Sonoran material Pycnidia: absent Spot tests: upper cortex K+ yellow, C-; medulla K-, C+ rose Secondary metabolites: upper cortex with atranorin (minor or trace); medulla with gyrophoric acid (major) and orcinyl lecanorate (=decarboxygyrophoric acid) (minor). Substrate and ecology: on rocks from 460 m on San Clemente Island, California) to 2880 m (Hidalgo) World distribution: possibly cosmopolitan, known from North, Central and South America, Europe and Africa Sonoran distribution: Arizona and California (Channel Islands) .
Punctelia stictica image
Samuel Brinker  
Punctelia stictica image
Punctelia stictica image
Stephen Sharnoff  
Punctelia stictica image
Stephen Sharnoff  
Punctelia stictica image
Punctelia stictica image
Punctelia stictica image
Punctelia stictica image
charles gardner  
Punctelia stictica image
Punctelia stictica image
Punctelia stictica image
Punctelia stictica image
Punctelia stictica image
Punctelia stictica image