Columbia subject headings:
Endangered plants--California, Southern.
Vernal pool plants--California, Southern.
Vernal pools--California, Southern.
Harvard subject headings:
Endangered plants--California, Southern.
Vernal pool plants--California, Southern.
Vernal pools--California, Southern.
Princeton subject headings:
Endangered plants--California, Southern.
Vernal pool plants--California, Southern.
Vernal pools--California, Southern.