My daughter sent me these photos from a friend who needs and ID Growing in Missouri is the only info I have. Just found out that it apparently has a square stem since he told my daughter that it wasn't round. And when he broke off a leaf it had a white milky sap.
Did anyone take a pic of the opened bloom? Looks like that bud was about to POP. Interesting mystery!
I got a text from her last night, he found an ID but she didn't say what, next text going out this morning.