The Donald and Sylvia McLaughlin Natural Reserve is a UC Davis Natural Reserve that straddles portions of Napa, Lake, and Yolo Counties. It protects roughly 7,000 acres of diverse habitats, including rare serpentine soils. This plant list includes voucher specimens and other observations from the Reserve, as well as adjacent properties in the drainages of the Knoxville, Hunting, and Davis creeks.

Habitat notations:

- SMC      Serpentine mixed chaparral       

- SCC       Serpentine cypress chaparral     

- SG         Serpentine grassland                 

- SRS       Serpentine riparian/seeps           

- BOW    Blue oak woodland

- MOW   Mixed oak woodland

- RW       Riparian woodland

- NSMC  Nonserpentine mixed chaparral

- CC        Chamise chaparral

- NSG     Nonserpentine grassland

- VP        Vernal pool  

- RD        Revegetated and/or disturbed   

- F           More common after fire             

- R/S       Rare or sensitive taxon