Um, Smilax is a monocot and will not have palmately lobed leaves.

M. Reed

Iris Cohen wrote:

I came across a plant that
looked unusual. It also looks a bit unfriendly.

If it is a vine with prickers, it is a Smilax

Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)