Irish lichens
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Order: Lecanorales Family: Parmeliaceae
Species: Usnea wasmuthii Photos: On fallen oak branch. Milmorane, Co. Cork, SW Ireland. Very similar to Usnea subfloridana and has been regarded as a chemotype. The base is blackened but with a different cracking-pattern. When well-developed the soralia are oval, flat and without isidia (isidiate only when young). Apothecia occasional. 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. Similar: Usnea subfloridana has round patches of raised soralia with isidia present. P+ yellow-orange instantly |
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Usnea wasmuthii. October 2009