looks like one to me.

bk

looks like a P. incarnata or maypop.

Thanks

A bit late with my comment...this could be many passiflora species. Incarnata or Maypop are the most common ones, but I have three or four that are not incarnata, etc. and they too have similar leaves. You will likely not know until it flowers. Then, you will be able to tell for sure. Irrespective...they all are simply beautiful...and some may bear fruit, too. Google gkplants.com in Oregon. She has a great supply of them and has them nicely categorized. You will be able to see leaves and flowers and get some info...that is if you desire. BTW, I am not affiliated with her (link) but I purchased plants for me and for my friends from her before and they were nice and healthy.

There are many hybrids with incarnata as one of the parents, quite often these have the habit of dying back below ground like incarnata and lutea do. A few are listed here P. 'Alena' , P. 'Asmara'

P. 'Blue Bird', P. 'Blue Byte', P. 'Blue Velvet', P. 'Byron Beauty' to name a few