Bitterroot

noun

1. A perennial herb (Lewisia rediviva) native to western North America, having showy pink or whitish flowers and a bitter but edible fleshy root.
2. The big-root, Megarrhiza Californica.
3. The Lewisia rediviva, a plant which gives its name to the Bitter Root mountains lying between Idaho and Montana.
4. Dogbane, Apocynum androsæmifolium.
5. A plant (Lewisia rediviva) allied to the purslane, but with fleshy, farinaceous roots, growing in the mountains of Idaho, Montana, etc. It gives the name to the Bitter Root mountains and river. The Indians call both the plant and the river Spæt'lum.