The lichen "Lecidea laboriosa", photographed in Mount Baldy, San Gabriel Mountains, Los Angeles Co., California, USA. "Notes: SUBSTRATE granite rocks by trail; ASPECT open; NOTES endolithic to thin, white scurfy “dirty” crust where present, thallus K- C- KC-, apothecia clustered and compressed, faintly white pruinose, epihymenium and exciple surface dark brown C-, hypothecium brownish, spores 10-12 × 3 µm."