Key trace in Brodo (2016): 1. Growing on rock, soil, or moss 10.(1) Lobes more or less uniform in thickness, not thicker at the margins 11. Lobes prostrate or on edge and overlapping, branched or rounded, often over 3 mm wide 12. Isidia or lobules present; thallus pustulate or not; on various kinds of rock 13. Isidia cylindrical or globular, not flattened 15. Isidia cylindrical on mature specimens, unbranched or branched; lobes strongly ridged and pustulate, 5-10 mm wide
Ken-ichi Ueda
2016-11-00
2016/11/05 4:24 PM PDT
United States of America, California, Bolinas Ridge Trail, Marin County, CA, USA