Mentions of rare plants in this PDF:
...Congdon’s tarplant (Centromadia parryi ssp. congdonii), or San Joaquin spearscale (Extriplex...
...swamps, or chaparral needed for Mount Diablo jewel flower (Streptanthus hispidus), slenderleaved pondweed (Stuckenia filiformis ssp. alpina), Hall’s bush mallow (Malacothamnus hallii),...
...Mount Diablo manzanita (Arctostaphylos auriculata), or Diablo helianthella (Helianthella...