Order: Ostropales       Family: Porinaceae Species: Porina aenea Growth type crustose. Photos: On Rowan and Ash. Co. Cork, SW Ireland. Thin reddish-brown or greenish thallus, prothallus absent. Small black perithecia, 0.1-0.2mm diam, involucrellum purplish-brown. Spores 3-septate, 13-20(-24) x 3.5-5 µm. Micrographs below Can be common in urban areas on trunks, branches and twigs of lightly shaded, young, smooth-barked trees, especially Ash and acers. Also found at the base of conifers in plantations. Similar: Porina borreri: Perithecia to 0.5mm, spores 6-7 septate. P. byssophila: Involucrellum K+ blue-grey to dark grey-brown. Strigula taylorii: Larger, +/- conical perithecia scattered among numerous dark pycnidia. Spores 1-septate, easily broken.

Microscope photographs



Porina aenea May 2010, April 2012 and August 2024