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Bransford, W.D. and Dolphia
Thermopsis montana Nutt.
Mountain goldenbanner, Montane golden-banner, Golden pea, Buckbean
USDA Symbol: THMO6
USDA Native Status: L48 (N)
This perennialís slender, 16-32 in. stems, purplish with a white coating, are slightly branched above and bear three-parted leaves. Yellow, lupine-like flowers occur in dense to interrupted clusters 4-12 in. long. Flowers are followed by velvety pods. A number of varieties are separated largely on the amount of pubescence present on the foliage. A plant with one or several hollow stems, slightly or not at all hairy, and yellow pea flowers in long racemes in upper leaf axils.
This genus resembles the Lupines, but Thermopsis has only 3 leaflets on each leaf; Lupinus has more. Yellow Peas, while handsome plants, are suspected of being poisonous. Among the several western species, some quite hairy, Prairie Thermopsis (T. rhombifolia), which grows on the eastern slopes of the Rocky Mountains and on the northwestern plains, has pods that spread outward from the curve or coil.
Plant CharacteristicsDuration: Perennial Habit: Herb Fruit: Size Class:
Bloom InformationBloom Color: Yellow
Bloom Time: May , Jun , Jul , Aug
, WY Native Distribution:
B.C. to n. CA,
e. to the Rockies of MT
& CO Native Habitat:
Well-drained, stony or sandy flats
Growing ConditionsLight Requirement: Sun
Soil Description: Dry to wet, rocky or sandy soils.
PropagationDescription: This plant is best propagated by seeds.
Seed Collection: Not Available
Seed Treatment: Not Available
Commercially Avail: yes
National Wetland Indicator Status
|Status:|| FAC || FAC |
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.
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Native Seed Network
- Corvallis, OR
Record Last Modified: 2010-05-01
Research By: TWC Staff