Either P. californicum or calirhiza...

Again, tentative ID. Growing on Q. durata. Looks a lot like Disholcaspis chrysolepidis, but maybe different species on a different host?

This is probably S. umbelliferum, but there were a bunch of plants growing nex to each other, all single, straight stems, unlike the more bushy S. umbelliferum I usually see.

Haven't attempted an ID yet.

I found this growing on an alder tree on an old trail that was converted into a logging road and then was converted back into a trail.

I think it is a ulota.