Micareaceae Micarea prasina Growth type crustose. Identification: Vince Giavarini Chemical results: Thallus and apothecia negative. Greenish pigment on thallus surface is K and C +/- violet Usually occurs on mature trunks and tree stumps in old-growth woodland. Light green to dark grey-green thallus of +/- globose granules (goniocysts). Apothecia when present are pinkish-buff, brown-grey or blackish. Very variable and frequently sterile, requiring t.l.c. for certain identification. Similar: Micarea micrococca

Micarea prasina sens lat
Holton Lee, Dorset. March 2013