The purple flower currently blooming in the flat lands is camas. As you drive along Hwy 200 through Potomac you can see several purple-tinged fields off to the north. The purple is the camas flowers.
Camas, Camassia quamash, is in the Lily Family. The root of purple camas was a main food source for Native people on the western side of the Rockies up into British Columbia. It was a highly prized trading commodity, especially with tribes who lived where camas did not grow. The bulbs could be eaten raw but were usually roasted in a pit from one to three days, which turned their starches into fructose making the bulbs sweet.
A word of caution: There are two kinds of camas – purple and death camas – and they grow in the same habitats. Death camas contains strychnine and will kill you if eaten. You can only distinguish between the two plants when they are in bloom – death camas has creamy white flowers and edible camas is purple. So please don’t dig any up. It’s absolutely not worth the risk.
Camas was cultivated by Native tribes. Families “managed” the same camas fields for generations. The bulbs were harvested with digging sticks, the land burned with low-intensity fires, and death camas weeded out. Under this intensive care the camas prairies thrived.
But when white settlers moved West and began plowing under camas prairies, it robbed tribes of a major source of sustenance and presented a real threat to their survival. The whites' destruction of camas prairies on Nez Perce lands in northeastern Oregon and the US government's efforts to move the Nez Perce away from their lands onto a small reservation in Idaho led to the Nez Perce War.