male California dogface nectaring on bull thistle
male Zerene eurydice nectaring on Cirsium vulgare
Asteraceae
Despite the fact our official state insect seems to fly practically all year around here (Monterey Co. and Pinnacles), I've only ever spotted this yellow butterfly a couple times. It's frequently reported that its only larval host plant is false indigo (Amorpha californica). Either that's not entirely correct, or plant folks generally don't bother looking for this native shrub. I say this because the plant checklists for Podere di Farfalla and San Benito County strikingly do not include false indigo, notwithstanding the reported 10-month flight period of the CA dogface in these same areas.
As a note to myself, I want to be sure to not mistake the CA dogface for the superficially similar orange sulphur (Colias eurytheme), another butterfly I don't often see and have yet to photograph.