I’m trying to figure out what this plant is.

It’s a voluteer plant that has serrated leaves and a reddish truck and branches. Some people suggested that it is a Brazilian Pepper Tree (Schinus terebinthifolius), but the leaves don’t quite match the photos I’ve seen.

Click below to see more photos.

Leaves as a young plant

Whole plant

Roots

This is growing in Vallejo, CA, USA (Northern San Francisco Bay Area), Zone 9a.

Anyone know what this plant is?