On a very hot day we passed a quarry where this plant was scrambling over rocks. It is an introduction here in Mediterranean countries as well as in the UK - originally from darkest Peru. The yellow flower above the red Nasturtium is Oxalis pes-caprae (Bermuda-buttercup) which is the commonest roadside weed in these parts

Gozo quarry, 23rd March 2005

Added on 23rd January 2007, updated 18th February 2012, updated 15th Nov 2014