Euphorbia myrsinites Glaucous Spurge
Also known as Blue Spurge, the leaves of this plant definitely have a bluish colouration. The leaves also appear to spiral up the stem and end in a point while the glands have distinct "horns". In the open grassland at this site it was plentiful.
Grassland near Bosco Quarto forest, Gargano, Italy 20th April 2009
Added on December 8th 2009, updated 30th March 2010