Cusick’s Checkermallow (Sidalcea cusickii). A host plant for the West Coast Lady (Vanessa annabella), Common Checkered Skipper (Pyrgus communis), Painted Lady (Vanessa cardui), Gray Hairstreak (Strymon melinus), and American Lady (suspected) (Vanessa virginiensis).
Kincaid’s Lupine (Lupinus oreganus). This is the primary host plant for the threatened Fender’s Blue (Icaricia icarioides fenderi).
Milkweed (Asclepias speciosa). This is the host plant for Monarchs (Danaus plexippus).
Ocean Spray (Holodiscus discolor). This is a host plant for Lorquin’s Admiral (Limenitis lorquini), Spring Azure (Celastrina echo), Gray Hairstreak (Strymon melinus), and Pale Swallowtail (Papilio eurymedon).
Rosy Checkermallow (Sidalcea virgata). A host plant for the West Coast Lady (Vanessa annabella) and Common Checkered Skipper (Pyrgus communis).
Slender Cinquefoil (Potentilla gracilis). It is a possible host plant for the Purplish copper (Lycaena helloides) and Two-banded Checkered Skipper (Pyrgis ruralis).
Stinging Nettles (Urtica dioica). This is a host plant for the Red Admiral (Vanessa atalanta), Painted Lady (Vanessa cardui), West Coast Lady (Vanessa annabella), Satyr Anglewing (Polygonia satyrus), and Milbert’s Tortoiseshell (Nymphalis milberti).
Riverbank Lupine (Lupinus rivularis). This is a possible host plant for the Western Tailed Blue (Everes amyntula).
Meadow Checkermallow (Sidalcea campestris). A host plant for the West Coast Lady (Vanessa annabella), Common Checkered Skipper (Pyrgus communis), Painted Lady (Vanessa cardui), Gray Hairstreak (Strymon melinus), and American Lady (suspected) (Vanessa virginiensis).
