I'm uploading this captive observation primarily because the species is so under represented and perhaps a vouched specimen may be useful to someone in some way.
Prolific seedlings under mature ornamental trees
@srall —. Can you recognize this weird oak?
This species seems to seed freely around established trees
Forming huge thickets at the upper elevations of Francis Canyon Ranch.
This Black Cherry is located along the blue trail in the Ridge Conservation Area. The second photo shows one of several black knots on the tree.