Unknown Marginal Identification?
This volunteered next to my pond. It has three separate growing stems. It is too small to tell for sure but I think the stems might end up being woody. Right now, it looks like it may have a vining habit. The leaves are compound. The leaflets are odd pinnate. The leaf remains green throughout the season but the stems are red. I thought it might be a Japanese maple but the chance of three seeds ending up next to my pond seems rather remote. Any ideas what it might be?