Bitterroot

For the waterway, see Bitterroot River.

Bitterroot
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 Pursh) is a small perennial herb in the Portulacaceae or purslane family. It is found in 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.

Description

Flower in University of California Botanical Garden

The plant 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.

Distribution

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.

History and culture

French trappers knew the plant as racème amer (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.

Meriwether Lewis ate bitterroot in 1805 and 1806 during the Lewis and Clark Expedition. The specimens he brought back were identified and given their scientific name, Lewisia rediviva, by a German-American botanist, Frederick Pursh.

The bitterroot was selected as the Montana state flower on February 27, 1895.

Three major geographic features, the Bitterroot Mountains (running north-south and forming the divide between Idaho and Montana), the Bitterroot Valley, and the Bitterroot River (which flows south-north, terminating in the Clark Fork river in the city of Missoula), owe the origins of their names to this flower.

Further reading

• Moerman. D. Native American Ethnobotany. Timber Press. Oregon. 1998 ISBN 0-88192-453-9

External links

• Media related to Lewisia rediviva at Wikimedia Commons
• Data related to Lewisia rediviva at Wikispecies
• Central Washington Native Plant Society
• Plants of the Lewis and Clark Expedition
• Bitterroot, Lewis and Clark National Historic Trail, U.S. Forest Service
• WSDOT - Ethnobotany - Herbs. Lewisia rediviva - Bitter-root, Sand Rose, Portulacaceae (Purslane Family)