This just recently popped up around some of my newly planted appletrees. They are right next to the slope of a fairly steep ditch. They have tiny, widely spaced spines lining them, and the white flowers droop a little.
I saw a plant that had the same leaves and the same spines on a friend's land, but the flowers were opened all the way up. They sort of made me thing of an eggplant flower-except not purple but white.
It was kind of shaped like a star. I wondered if that might be what I have as well. I saw some others on her land that had what looked like drooping white-ish berries on the same types leave and spines.
Just to be clear on this... As Wayne Stephen already mentioned, this particular "nettle" IS a solanum, meaning it belongs to the same family as tomatoes and deadly nightshade. The problem with using common names is that they can be really confusing and may lead to mistakes -- even fatal ones. Because there are so many people who are used to hearing about how good nettles are to eat, (especially on this website) I thought it might be a good idea to mention that this is not that kind of nettle, and it is poisonous. You probably already know this, but for those who don't, please do not eat it!