Prostrate and erect forms.
Looks a bit like a sea horse, about 8 inches long
Non native plant at North Entrance to Devil's Slide Trail San Mateo California. Blooms purple flowers May through July.
North Side North End before first platform
Last bit of evidence.
Tiny, about 1/2" across carapace.
Dried hydroid colony on seagrass.
Leafy Hornmouth? The shell, not the hermit, please.