Red Clintonia, Clintonia andrewsiana, Sam McDonald Park, 2006
I only found plants with fruit since the flowering season must be past at this time.
Not sure what else it could be.
Clintonia andrewsiana is a species of flowering plant in the lily family known by the common names Andrews clintonia and red clintonia. It is native to Oregon and northern California, where it grows in shady, moist areas of the coastal redwood forests. It is a rhizomatous perennial herb growing 30 to 80 centimeters tall. Around the base of the plant are 5 or 6 wide, hairy, oval-shaped green leaves up to 30 centimeters long and 12...