Mentions of rare plants in this PDF:
...California black walnut (Juglans californica), California sycamore (Platanus racemosa), and Tecate cypress (Hesperocyparis...

Mentions of rare plants in this PDF:
...Oak hybrids; Southern California Black Walnut (Juglans californica var. californica); California...
...Abronia villosa var....
...Astragalus hornii...
...Atriplex parishii...
...Calochortus weedii...
...Centromadia parryi...
...Dudleya multicaulis...
...to intergrade with Calochortus plummerae, which is mostly east and north of...

Mentions of rare plants in this PDF:
...(Centromadia parryi ssp. congdonii), a CNPS Rank 1.B1 species, is known to occur within 3.25...