Blooms were very tiny, less than 1/4 inch.
at Nimbus Fish Hatchery
burr clover in foreground; the stalked flower is something else - will have to come back to it - perhaps a geranium?
Medicago polymorpha is a plant species of the genus Medicago. It is native to the Mediterranean basin but is found throughout the world. It forms a symbiotic relationship with the bacterium Sinorhizobium medicae, which is capable of nitrogen fixation. Common names include California burclover, toothed bur clover, toothed medick and burr medic.