Order: Lecanorales       Family: Micareaceae Species: Micarea prasina s. lat Growth type crustose, granular. Specimen identified by John Douglass Photos: On shaded moss on sycamore. Snave, Cork, SW Ireland. Very variable and frequently sterile, requiring expert identification. Light green or pale to dark grey-green thallus comprised of +/- dense, +/- globose goniocysts that sometimes form granules. Apothecia (when present) whitish, pale to dark grey, brown-grey or blackish. White, greyish or black pycnidia. On tree stumps and mature trunks in old-growth woodland. Thallus and apothecia: chemical reactions negative. Greenish pigment on thallus surface is K and C +/- violet. The Micarea prasina s. lat aggregate comprises Micarea byssacea, M. isidioprasina, M. micrococca, M. prasina, M. pseudomicococca, M. subviridescens, M. viridileprosa, M. xanthonica

Micarea prasina s. lat,. October 2009