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A picture of a Thermopsis

Thermopsis

Thermopsis spp.

Thermopsis villosa (syn. T.caroliniana), Carolina lupine by Bob Gutowski (CC BY 2.0)

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Thermopsis rhombifolia (1)
A photo of Thermopsis

Overview

A genus in the legume family of summer flowering hardy herbaceous perennials native to North America and East Asia. They are lupin-like rhizomatous plants with characteristic pea-like trifoliate leaves and yellow or purple flowers. Cultivated varieties go by the common name false lupin or goldenbanner. They are usually long-lived and fairly tough, and prefer well-drained soils but are tolerant of a range of conditions.