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Everniastrum constictovexans Sipman
Nomenclature
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Family: ParmeliaceaeGenus: Everniastrum
SUMMARY
Mycobank MB 517768
Thallus foliose to subfruticose, corticolous, over 5 cm wide, not coriaceous, dichotomously lobate. Lobes long-linear, separate, 0.6–1.5 mm wide, over most of their length strongly convex and subtubular. Upper surface pale grey, slightly shiny, epruinose, weakly maculate, isidiate, lacking soredia, pustules, dactyls or lobules. Isidia cylindrical, scattered over the surface, concolorous with the thallus, when young often brown-capped, when old often with an erect, apical, black cilium. Medulla white. Lower surface black, towards the lobe tips brown. Cilia black, slender, 1–4 mm long, simple or occasionally once dichotomously branched. Apothecia and Pycnidia not seen. Chemistry: upper cortex K+ yellow, C–, KC–, P–, UV–, medulla K+ orange, C–, KC–, P+ orange-red, UV–. Secondary metabolites: Upper cortex with atranorin, medulla with constictic and protolichesterinic acids (TLC).