Species: Usnea rubicunda
Photos: On oak branch. Glengarrif woods, Cork, SW Ireland.
Distinctive dull reddish-brown colour with base not blackened. Sparse or numerous branches not constricted, +/- right-angled to main stem. Coarse, warted stems with clusters of isidia becoming sorediate. Can be confused with decomposing U. cornuta.
Occurs on trunks and branches of trees in unpolluted woodland, most frequent in west of Ireland. Medulla: K+ orange, P+ orange
Usnea rubicunda. January 2009 and September 2010