Melanohalea subolivacea

Thallus: adnate to loosely adnate appressed throughout or somewhat raised at the periphery, foliose, up to 8 (-11) cm diam., lobate lobes: short and rounded, ± contiguous to imbricate, (1-) 2-6 (-l 0) mm broad, ± flat upper surface: olive-brown to dark brown, smooth to weakly rugose or pitted near the periphery, inward becoming more strongly rugose and often grossly so, sometimes with isidioid papillae or tubercles, these verging on true isidia in extreme cases; dull throughout or somewhat shiny.. more