Erythranthe parishii

Erythranthe parishii is a species of monkeyflower known by the common name Parish's monkeyflower. It was formerly known as Mimulus parishii. It is native to the mountains and hills of the southern half of California, far western Nevada, and northern Baja California, where it grows in wet, sandy habitat such as streambanks. The flowers primarily self-pollinate, but the species evolved from an out-crossing ancestor similar to E. lewisii. The flower size greatly reduced as the species transitioned to self-pollination through changes in a number of genes that each have a small effect on the size....read more on Wikipedia.