Answer to the September's Horticulture Challenge

This is the Calochortus elegans,  a species of flowering plant in the lily family known by the common name elegant Mariposa lily, or cat's ear.
The Mariposa Lily is a perennial herb that is native to the western United States from northern California to Montana. It can easily be missed if you were not looking for it. The bulb is a choice wild root vegetable when eaten cooked and can be eaten raw to avoid starvation. It grows in open woodland and grassy hillsides.

Source: Wildflowers of the Pacific Northwest and wikipedia