Pocture taken on the 26th May 2007, near Masella road km 14, Oriental Py renees, Baixa Cerdanya, Girona, Catalonia, Spain, on calcareous rock substratum, North oriented, 70 %, 1.450 m. altitude.
Collema crispum was already mentioned by Vayreda from Nuria mountains, it is commpn on calcareous rocks upland, at least in this part of Cerdanya.
Fruticose thallus from green olive when wet to black when dry, lobes under 6 mm wide, isidia evident, not very big, up to 6 cms, white rhizinae on the down side.