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All Fungi
Pertusaria flavida
Nomenclature
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Family: PertusariaceaeGenus: Pertusaria
SUMMARY
Thallus pale or bright sulphur yellow to yellow-green-grey or yellow-brown, sometimes with a pale to dark grey margin, rather thick and uneven, ± coarsely rimose. Upper surface coarsely warted, flat, smooth or somewhat roughened. Isidia numerous, simple, globose or shortly cylindrical-clavate, occasionally dissolving into soredia and obscuring the thallus, leaving faint cortical scars when shed.
Anamorph: not known.
Teleomorph: ascomata apothecia, very rare, immersed in groups of two to five in hemispherical, sorediate-isidiate warts. Disc black-brown, punctiform. Asci (4-) 8-spored. Ascospores 60-100 × 25-40 μm, wall 7-10 μm thick, less than 20 μm thick at the ends.
Thallus C+ orange, K–, KC+ orange, Pd–, UV+ bright orange or yellow-orange (thiophaninic and an unidentified substance).