"Purple" Deadnettle

So I thought about what you said. It was helpful to have the additional information about the environment around this plant. I also did a brief search for Purple Deadnettle with white flowers. The white flowers seem to happen occasionally. It is probably a natural genetic variant (maybe a recessive gene). I think you are correct with the ID of Lamium purpureum. Lamium album grows differently. I must have been tired or something when I looked at the pictures. Your plant clearly looks like Lamium purpureum. Sorry about the confusion!

Here are a couple I found with white flowers like yours:
http://www.aphotoflora.com/d_lamium_purp...
http://www.flickr.com/photos/koujituji/8...

This would be a good addition to the Rare Color Morphs mission:
http://www.projectnoah.org/missions/7970...

Thanks so much for sharing this rare beauty! You better believe I will be looking extra closely at the Purple Deadnettle around here for white flowers now. Haha!

Dude, I came across Lamium album, and was shocked! I'd never heard of it before, but I hesitate to call this Lamium album. It was growing right in the midst of a solid acre of Lamium purpureum, and was completely identical to the purpureum around it in ever feature except for the flower color. I don't know how much variation this genus gets, but I might have to stick with purpureum for now because of how similar it was to the surrounding deadnettle with flower color being the only exception. But white flower sure are odd for purpureum...

I just took a look and compared yours to mine and discovered why yours may be white. I think yours is actually a White Deadnettle, Lamium album. The flower arrangement are slightly different and the leaves are also a bit less hairy and a different color.
http://www.pfaf.org/user/Plant.aspx?Lati...
http://plants.usda.gov/java/profile?symb...

Here is the link to my Purple Deadnettle: http://www.projectnoah.org/spottings/216...

You can see the similarities but also the differences.

I haven't seen any with white flowers yet. Nice find!