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Parmotrema praesorediosum (Nyl.) Hale
Family: Parmeliaceae
[Parmelia praesorediosa Nyl.]
Parmotrema praesorediosum image
Stephen Sharnoff  
Thallus: foliose, adnate, 3-10 cm in diam., lobate lobes: subirregular, elongate, slightly imbricate, plane, separate, 4-10 mm wide; apices: rotund, often suberect, eciliate upper surface: gray, smooth, dull, emaculate to faintly white maculate, becoming cracked with age soredia: granular, common, in linear to crescent-shaped, marginal or submarginal soralia; isidia and pustulae: absent medulla: white with continuous algal layer lower surface: black with brown to mottled ivory naked zone peripherally, centrally rhizinate; rhizines: scattered, simple Apothecia: rare, substipitate, up to 10 mm in diam.; margin: sorediate; disc: brown, imperforate ascospores: ellipsoid, 15-21 x 7-10 µm Pycnidia: rare, punctiform conidia: sublageniform, 7-8 x 1 µm Spot tests: upper cortex K+ yellow, C-, KC-, P-; medulla K-, C-, KC-, P- Secondary metabolites: upper cortex with atranorin and chloroatranorin; medulla with protopraesorediosic and praesorediosic acids (major), unknown fatty acids (minor). Substrate and ecology: on rocks and trees in open habitats World distribution: pantropical and pantemperate Sonoran distribution: thorn forests of Sonora, Sinaloa and southern Baja California Sur. Notes: Originally the species was reported to have caperatic acid (Hale 1965), but subsequent investigation has shown the fatty acids to be unique (Elix 1994k).
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Troy McMullin  
Parmotrema praesorediosum image
Troy McMullin  
Parmotrema praesorediosum image
charles gardner  
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Gary Perlmutter  
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Gary Perlmutter  
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image
Parmotrema praesorediosum image