Irish lichens

Usnea wasmuthii

Order: Lecanorales       Family: Parmeliaceae

Species: Usnea wasmuthii

Growth type fruticose.
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)


Usnea wasmuthii


Usnea wasmuthii


Usnea wasmuthii
Usnea wasmuthii. October 2009

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