Found in most of Italy, the Balkans, Greece and Portugal, L. bifidum usually has white flowers and leaves with a prominent white mid rib. The Italians call it Bifid False Nettle perhaps because it doesn't sting and the leaves are divided by the white mid rib which is not very prominent in these photos.

Rocky Hillside not far from Monte St. Angelo, Gargano, Italy 20th April 2009

Added on March 5th 2010