Species: Hypotrachyna sinuosa
Photos: On rock and Oak trunk. Co. Cork, SW Ireland.
Specimen immediately below confirmed by John Douglass
Smooth yellowish-green thallus with narrow, sinuate lobes. Underside black with branched rhizinae that often extend beyond lobe edges. Farinose concolorous soralia. Apothecia unknown.
Mainly found in western Ireland on well-lit trees and acidic rocks.
Medulla and soredia K+ orange, C-, P+ orange, UV- or +white
Hypotrachyna sinuosa. February and November 2009