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Parmotrema cetratum (Ach.) Hale (redirected from: Rimelia cetrata)
Family: Parmeliaceae
[Parmelia cetrata Ach.,  more]
Parmotrema cetratum image
Stephen Sharnoff  
Thallus: foliose, loosely adnate to adnate, 3-15 cm in diam., lobate lobes: subirregular, elongate, slightly imbricate, plane, separate, 8-15 mm wide (very variable); margin: becoming dentate lacinate with age; lacinae: 5-10 x 1-2 mm; apices: rotund, ciliate; cilia: sparse, simple, up to 2.0 mm long upper surface: ashy white to gray, smooth, dull, strongly reticulate maculate, becoming reticulately cracked with age along the maculae; soredia, isidia and pustulae absent medulla: white with continuous algal layer lower surface: black with narrow brown zone peripherally, rhizinate to margin or narrowly erhizinate marginally; rhizines: scattered, simple to squarrosely branched Apothecia: common, substipitate, up to 10 mm in diam.; margin: rugose, white maculate; disc: often perforate, concave or flat ascospores: simple, hyaline, ellipsoid, 13-15 x 7-9 Pycnidia: common marginally conidia: filiform, 10-14 x 1 µm Spot tests: upper cortex K+ yellow, C-, KC-, P+ yellow; medulla K+ yellow turning deep red, C-, KC-, P+ orange Secondary metabolites: upper cortex with atranorin and chloroatranorin; medulla with salazinic acid (major) and consalazinic acids (minor). Substrate and ecology: usually on trees World distribution: pansubtropical and pantemperate; common especially in SE USA and South Africa Sonoran distribution: SE Arizona and adjacent Sierra Madre Occidental of Chihuahua, Sonoran and Sinaloa.
Parmotrema cetratum image
Stephen Sharnoff  
Parmotrema cetratum image
Stephen Sharnoff  
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Lynda Miller  
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image
Parmotrema cetratum image