Wildflowers of Ainsworth: Purple Dead Nettle

(Click on image to enlarge)

Found in the soybean field beside Deep River County Park. It's a small plant; I had to lie flat on the ground to get this photo.

I had a hard time identifying this* because it looked different from the drawing in my guide, but then Lawrence Newcomb says that common hedge nettle is a "very variable species with rough or smooth stem, and lance-shaped, oblong or egg-shaped leaves." And this looks even less like anything else. So I think what we've got here is common hedge nettle.

Nothing interesting about it, but at least it's not stinging nettle.
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*[5/2/11 update] Now I think I misidentified it — it's purple dead nettle.