or bit·ter root

[bit-er-root, -roo t]
  1. a plant, Lewisia rediviva, of the purslane family, having pink flowers and fleshy roots that are edible when young: the state flower of Montana.

Origin of bitterroot

An Americanism dating back to 1825–35; bitter + root1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for bitterroot

Historical Examples of bitterroot