Stinging Nettle (Urtica dioica), a European import.
Spiny or Purple Pigweed (Amaranthus spinosus). This plant I had flagged and was going to follow its growth. Along came a flood and even the piece of land wasn’t there anymore. I do know its big und ugly later but here it looks like a house plant.
Red Root Pigweed (Amaranthus retroflexus)