Bj. Coppins et T. Tonsberg, A new xanthone-containing Micarea from Northwest Europe and the Pacific Northwest of North America, LICHENOLOGI, 33, 2001, pp. 93-96
Micarea xanthonica sp. nov. is described from the western British Isles, we
sternmost Norway and the Pacific Northwest of North America. It belongs to
the M. prasina group, but differs from related species in possessing xantho
nes in the thallus. (C) 2001 The British Lichen Society.