Picture taken on the 2/02/2008 near Santa Maria de Bruguers ermitage, Gava, Barcelona, Catalonia, vertical position, in a small cave in a cliff, on red sandstone with certain soil.
Leprose thallus, initially glaucous-green, with leprose granules . Secondary pseudopodetia paler and branched forming like small trees.
Negative spot reactions.
See very good picture in Wirth et alter, Guía de campo de los líquenes, musgos y hepáticas, edit. Omega, pag.305.