I found this sprouting behind my porch a few months ago and just let it grow to see what it would become. It was @ 5 1/2 - 6' in height until something (squirrel or raccoon maybe) bent and broke two of the branches. I'm thinking "Common Evening Primrose" (Oenothera biennis) but I'm just so bad at comparing photo's. Any confirmation or suggestions greatly appreciated!
Branch/Stems:
Leaves:
Bloom: (The color is actually lemon yellow, one photo looks a bit orange because of the light)