Family: Ramalinaceae Species: Bacidina phacodes (Bacidia phacodes) Growth type crustose Photos: Dromre, Co. Cork, SW Ireland. Smooth, warted or scurfy, whitish to grey-green thallus. Apothecia flat to convex, discs beige or pink-orange, the margins usually paler. Hypothecium colourless. Spores 3-7 septate, 20-45 x 1.5-2 µm. Pycnidia are immersed, conidia 25-50(-60) x 1-1.5 µm, septate. Micrograph below. Widespread but infrequent in Ireland on basic or nutrient-rich bark of shaded, mature trees Similar: Bacidina delicata and Bacidia rubella, acicular spores. Lecania chlorotiza and L. cyrtellina have 0-1 septate spores.

Micrograph

Bacidina phacodes (Bacidia phacodes). August 2024