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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Cardamine occidentalis

Cardamine occidentalis (S. Watson ex B.L. Rob.) Howell

Big Western Bitter Cress, Big Western Bittercress, Western Toothwort

Brassicaceae (Mustard family)

Synonym(s): Cardamine pratensis var. occidentalis


USDA Native Status: L48 (N), AK (N), CAN (N)


From the Image Gallery

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Plant Characteristics

Duration: Perennial
Habit: Herb
Size Notes: Up to about 20 inches tall.

Bloom Information

Bloom Color: White , Pink
Bloom Time: Mar , Apr , May , Jun , Jul


USA: AK , CA , OR , WA
Canada: BC
Native Habitat: Muddy grounds, lake margins, shallow streams, meadows.

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 30 - Calflora (2018) Calflora
Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Cardamine occidentalis in USDA Plants
FNA: Find Cardamine occidentalis in the Flora of North America (if available)
Google: Search Google for Cardamine occidentalis


Record Modified: 2020-10-27
Research By: CBR

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