Order: Lecanorales       Family: Stereocaulaceae Species: Stereocaulon vesuvianum Growth type fruticose. Photos: On acidic upland rock. Ballingeary, Cork, SW Ireland. Variable. Primary thallus non-persistent. Compact tufts of erect or decumbent grey-white pseudopodetia, branched or unbranched. Small phyllocladia usually with dark grey centres and pale margins. Occasionally sorediate, cephalodia rare, containing Stigonema. Occurs throughout Ireland on well-lit upland siliceous rocks. K+ yellow or occasionally red, KC-, P+ orange, UV- var. nodulosum. Occasional, on N and W Irish coasts. var. symphycheileoides. Only recorded from Dingle peninsula.

Stereocaulon vesuvianum. November 2008 and August 2009