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Pyxine subcinerea Stirton (redirected from: Pyxine chrysanthoides)
Family: Caliciaceae
[Physcia melanenta C. Knight,  more]
Pyxine subcinerea image
Stephen Sharnoff  
Thallus: foliose, ± firmly appressed, up to 8 cm in diam., usually smaller (3-5 cm) lobes: flat to slightly concave, 0.3-0.6 mm wide soredia: always present, farinose, initially in marginal, fissural, rarely later in laminal, orbicular soralia; isidia and polysidiangia lacking medulla: upper part lemon to beige yellow, very thin lower part white lower surface: black in center, paler towards lobe tips; rhizines: ± dense, blackish, furcately divided Apothecia: obscurascens-type, common, laminal, 0.3-1.5 mm wide; disc: black, not pruinose internal stipe: weakly developed, upper part brownish-red, lower part whitish ascospores: one-septate, brown, 13-19 x 6-8 µm Pycnidia: immersed conidia: bacilliform, 3-4 x 1 µm Spot tests: upper cortex K-, C-, KC-, P-; medulla upper and lower part K-, C-, KC-, P-; internal stipe upper part K+ purple, C-, KC-, P-; lower part K-, C-, KC-, P- Secondary metabolites: upper cortex with lichexanthone; medulla with terpenes of a characteristic pattern on TLC plates, and an unknown pigment. Substrate and ecology: on bark, wood, and rarely on acidic rocks from sea level to high montane areas World distribution: pantropical with scattered collections from the subtropics and warm temperate regions, insular Laurimacaronesia and Europe/Italy Sonoran distribution: Arizona, Baja California Sur, Sinaloa and Sonora, at low to intermediate elevations from thorn forests to oak forests. Notes: Previously specimens belonging to this species have been reported under the names of P. caesiopruinosa and P. meissneriana.
Pyxine subcinerea image
Troy McMullin  
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Gary Perlmutter  
Pyxine subcinerea image
Stephen Sharnoff  
Pyxine subcinerea image
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Pyxine subcinerea image
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Pyxine subcinerea image
Pyxine subcinerea image
Lynda Miller  
Pyxine subcinerea image
Pyxine subcinerea image
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Pyxine subcinerea image
Pyxine subcinerea image
Pyxine subcinerea image
Pyxine subcinerea image
Pyxine subcinerea image
Pyxine subcinerea image
Pyxine subcinerea image
Pyxine subcinerea image
Pyxine subcinerea image
Pyxine subcinerea image
Pyxine subcinerea image