I thought I had found a wild grape plant near my woodpile and readied it for transplant. After checking online, I'm pretty sure it is not a grape plant. I'm now suspicious that this might be a bad boy. Is this Japanese knotweed or another aggressor? Thank you!
What a relief! I just checked further online and you are right. There it is, Smilax rotundifolia L. - Roundleaf greenbrier. Noninvasive, and native!! Wonderful! Thank you Tupularia!