Bitterroot | |
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Lewisia rediviva var. rediviva in Wenas Wildlife Area, Washington | |
Scientific classification | |
Kingdom: | Plantae |
(unranked): | Angiosperms |
(unranked): | Eudicots |
(unranked): | Core eudicots |
Order: | Caryophyllales |
Family: | Portulacaceae |
Genus: | Lewisia |
Species: | L. rediviva |
Binomial name | |
Lewisia rediviva Pursh |
Bitterroot (Lewisia rediviva) is a small perennial herb in the Portulacaceae or purslane family.
The plant is native to western North America from low to moderate elevations on grassland, open bushland and forest. A small species of dry rocky or gravelly soils, it bears a single pink to lavender to white flower.
Lewisia rediviva is a low-growing perennial plant with a fleshy taproot and a simple or branched base. The flower stems are leafless, 1–3 centimetres (0.4–1.2 in) tall, bearing at the tip a whorl of 5–6 linear bracts which are 5–10 mm long. A single flower appears on each stem with 5–9 oval-shaped sepals. They range in color from whitish to deep pink or lavender. Flowering occurs from April through July. The petals (usually about 15) are oblong in shape and are 18–35 millimetres (0.7–1.4 in) long. At maturity, the bitterroot produces egg-shaped capsules with 6–20 nearly round seeds.
The plant grows on gravelly to heavy, usually dry soil on grassland, open shrubland or open forest from low elevations to the subalpine. Its range extends from southern British Columbia, through Washington and Oregon east of the Cascade Range to southern California, and east to western Montana, Wyoming, northern Colorado and northern Arizona.
French trappers knew the plant as racine amère (bitter root). Native American names included spetlum or spetlem, meaning "bitter", nakamtcu (Ktanxa: naqam¢u), and mo'ôtáa-heséeo'ôtse (Cheyenne, "black medicine")
The roots were consumed by tribes such as the Shoshone and the Flathead Indians as an infrequent delicacy. Traditionally, the Ktunaxa cooked bitterroot with grouse. For the Ktunaxa, bitterroot is eaten with sugar; other tribes prefer eating it with salt. The Lemhi Shoshone believed the small red core found in the upper taproot had special powers, notably being able to stop a bear attack.