bit·ter·root 
(bĭtər-rt′, -rt′)
(bĭtər-rt′, -rt′)n.
A perennial herb (Lewisia rediviva) native to western North America, having showy pink or whitish flowers and a bitter but edible fleshy root.
bitterrootLewisia rediviva
- white-collar
- white corpuscle
- white crappie
- white-crowned sparrow
- white daisy
- whited sepulcher
- white dwarf
- white elephant
- white-eye
- whiteface
- white-faced
- white fat
- white feather
- Whitefield
- whitefish
- white flag
- white flour
- whitefly
- white-footed mouse
- white fox
- White Friar
- white-fronted goose
- white frost
- white gasoline
- white-glove