Leopard lilies (Lilium pardalinum), are endemic to California, and grow by stream beds almost all over the state. Though not rare per se, they're not a dime a dozen by any means, and their fist-sized blooms dangling from a 3 foot high stem are as impressive as any cultivated garden flower. This one above was blooming among the thimbleberry and sedges on the banks of Flynn Creek, near where it feeds into the Navarro River. The other pictures are in the Albion River.
Photos taken on July 18 and 23.