Baja California, Boojum, MEX/(Idria columnaris) with crescent moon, pre-dawn, Catavinia. 1/89v xa

Baja California, Desierto, MEX/Central, Boojum (Idria columnaris) with lichen (Ramalina reticulata) in morning fog near El Rosario. 290v aca

Baja California, Desierto, MEX/Central, granite boulders near Catavina with Senita cactus (Cereus schottii) & Boojum (Idria columnaris) at sunset. 290h aca