Have no idea, but welcome to TEG! Glad to have you here. Can you get a close up picture? It might help identify it. @digitS' and @journey11 are pretty good at ID on plants.
No... wait.. I think I see something that I have all over my yard... I have no idea what it's called, but when you touch it, it throws seeds all over the place.
From the stems and leaves that I can see at the bottom of the photo in detail, that's what it looks like to me too (purple deadnettle). There's another that looks very similar to it, Henbit. Maybe that's what you were thinking of. Creeping Charlie is also resembles it a bit. See this link for differences between the 3.
Although it can spread out and take over in the spring, I find it pulls up easily and gives up as summer's heat wears on.