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Mountain Goldenbanner, Mountain Thermopsis, False Lupin, Golden pea, Buckbean - Thermopsis montana


Family: Fabaceae - Pea family Genus Common Name: Goldenbanner Native Status: NativeDicot Perennial Herb
Thermopsis montana - Mountain Goldenbanner, Mountain Thermopsis, False Lupin, Golden pea, Buckbean. Thermopsis montana is one of 10 Thermopsis species in the United States, although some authorities include it in the very similar T. rhombifolia (Prairie Thermopsis.) T. montana is the more western of these two species, with Montana being the only state having both species.

Thermopsis gracilis is another similar species which is found in the same range in the western United States. Based on my research it may be a less common species, and may be more branching. Since I'm no expert, it is possible that this is T. gracilis rather than T. montana.

Found in:
AZ, CO, ID, MT, NM, NV, OR, UT, WA, WY

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Thermopsis montana

Distribution of Thermopsis montana in the United States and Canada:
Map unavailable.
Map courtesy of The Biota of North America Program.
Map color key

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Site: Adams County, ID Date: 2011-June-18Photographer: Gerald C. Williamson
Nikon D7000
Mountain Goldenbanner has a spike of fairly large (for a member of the Pea Family) yellow blossoms terminating the branches. The shap makes them quite recognizable as blossoms of Fabaceae.
Thermopsis montana
Site: Adams County, ID Date: 2011-June-18Photographer: Gerald C Williamson
Nikon D7000
Mountain Goldenbanner grows up to about 4 feet tall. The leaves are alternating, each with three oval to oblong leaflets.
Click on the photo for a larger image
Thermopsis montana
Site: Adams County, ID Date: 2011-June-18Photographer: Gerald C Williamson
Nikon D7000
It grows in meadows and along streams.
Click on the photo for a larger image
Thermopsis montana
References used for identification and information:
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Thermopsis montana initially published on USWildflowers.com 2012-01-06; Updated 2017-03-02

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All content except USDA Plants Database map Copyright Gerald C. Williamson 2024
Photographs Copyright owned by the named photographer



Code Update 20230302