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White locoweed

Oxytropis sericea

Also called Silky Locoweed, Silvery Oxytrope, White Crazyweed, Early Yellow Locoweed, White Oxytrope, Locoweed, Silky Crazyweed

White locoweed
Photo: Matt Lavin, CC BY-SA 2.0

White locoweed is a low perennial herb of western North American grasslands and mountains, growing up to about 30 cm from a long taproot. It is a wild species rather than a garden plant, and it is best left in its native habitat.

Family
Fabaceae (Pea & bean family)
Grows as
Perennial
Light
Full sun
Water
Drought tolerant once established; water sparingly.
Soil
Well-drained, sandy or gravelly soil.
Temperature
Hardy to cold winters; native to subarctic and subalpine climates.
How easy
Moderate
Safety
Toxic: Contains swainsonine and other compounds that cause locoism in livestock and can be harmful if eaten in quantity.. Not toxic to cats or dogs (ASPCA).
Native range
Yukon to W. & C. U.S.A.
Climate
subalpine or subarctic

About

Oxytropis sericea is a species of flowering plant in the legume family known by the common names white locoweed, white point-vetch, whitepoint crazyweed, and silky crazyweed. It is native to western North America from Yukon and British Columbia south through the Pacific Northwest, the Rocky Mountains, and the Great Plains.

This plant is a perennial herb growing up to about 30 centimetres (12 inches) in maximum height. It grows from a long taproot. The leaves are up to 20 cm (7.9 in) long. One plant may produce several flowering stalks, each with up to 27 flowers. The fruit is a legume pod up to 2.5 cm (0.98 in) long containing many hairy, leathery, kidney-shaped seeds. The tough seeds can remain dormant in a soil seed bank for a long time. This helps the species survive stress conditions such as cold, exposure, and desiccation.

Other Oxytropis plants

Field locoweed

Text excerpted from the Wikipedia article Oxytropis sericea by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

Pet safety from the ASPCA toxic and non-toxic plant lists.

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