Updated (belatedly) on June 20, 2012: the photographer had a misidentification with the image. The original image posted was instead Lamium galeobdolon — fortunately, the photographer had an additional image of this species, so that was inserted in instead.
Thank you to Michaël Mazars (aka Mikl – Concept-Photo.fr (CRBR)@Flickr) for sharing an image with us via the Botany Photo of the Day Flickr Pool (original image). Always great to highlight a new contributor!
Known as ortie blanche in France (where the photograph was made), other common names for Lamium album include white deadnettle and bee nettle. This species is native to Europe and western Asia, though it has now naturalized in eastern Canada, northeastern USA, Alaska and Mississippi.