Crab Spider (Diaea livens) in Flower of Narrow-leaved Mule Ears (Wyethia angustifolia)
Crab spiders wait for pollinators. They can change their color, gradually, to match their environment. Very patient! I believe this is W. angustifolia, but it could be W. glabra (smooth mule ears). Road F near the start of the blue oak forest.