Photo category: Herbarium specimen collection
- Photo taken Locality: Greece, Crete, Rethymno, Kissou Kampos
- Photo taken by: Avramakis, M.
- Photo taken date: March 2013
Photo of a NHMC herbarium specimen of NHMC Herbarium specimen of Cretan Rock-lettuce, Petromarula pinnata. It is one of the four endemic genera of Greece. It is a monotypic genus endemic of Crete. As an obligatory chasmophyte, it grows almost exclusively, on cliff's crevices.