Yellow-flowering plant with straight stalk.
Low-growing grass, grows in salty area.
6-foot tall shade plant, leaf like poison oak.
Waist-high flowering plant.
Small fern growing near water source, in the shadow of redwoods.
Heard but not seen. Captured video of its song, verified ID with others and audio clips online. On cliff side N Pacific Ave, Santa Cruz, CA
Not native to California
I suspect it's Veronica americana
An extremely slimy monkey flower, Mimulus moschatus