This pretty, bright green, delicate plant seems to grow wherever soil has been disturbed. In the open field where I have my garden, that means it primarily grows wherever I am trying to work -- at the edges of the garden berms, around the raised beds, any place I've planted fruit trees or berries. I mulch pretty heavily but it still finds a foothold.
Don't let its lovely heart shaped leaves fool you. It's a killer. The tiniest touch leaves bright red streaks on my skin, and mean, lingering sting. I mean this plant causes some serious pain. Here's a measure that anyone from around here should respect: I'd rather be bitten by fire ants than encounter this plant. Aahh, now you understand.