Irish lichens
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Order: Lecanorales Family: Parmeliaceae
Species: Usnea wasmuthii Photos: On fallen oak branch. Milmorane, Co. Cork, SW Ireland. Specimen identified by John Douglass Very similar to Usnea subfloridana and has been regarded as a chemotype. Soralia are more oval and isidiomorphs +/- restricted to main branches. Base blackened but with a different cracking-pattern. Apothecia absent. Very local distribution on deciduous trees, most Irish records are from the NW. Often found with U. subfloridana. Chemical reactions are variable, either soralia and medulla K-, P- or soralia K+ yellow-orange to red, P+ yellow after 1 minute. (U. subfloridana is P+ yellow-orange instantly) |
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Usnea wasmuthii. October 2009