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Thermopsis macrophylla
Also called Santa Ynez Goldenbanner
Santa Inez goldenbanner is a rare, rhizomatous perennial legume from the Santa Ynez Mountains of California, grown mainly by specialists rather than as a common garden plant. It is fire-dependent: its hard-coated seeds need heat to germinate, so it is hard to propagate in ordinary gardens.
Thermopsis macrophylla is a species of flowering plant in the legume family known by the common names Santa Inez goldenbanner and Santa Ynez false-lupine.
It is endemic to Santa Barbara County, California, where there are 500 to 2500 individuals remaining in the Santa Ynez Mountains. Only two occurrences have been confirmed recently, but the appearance of plants in coming seasons will depend on wildfire activity in the region, because plants spring up from the dormant seed bank after fire. All the known populations occur on wildlands within the Los Padres National Forest.
California goldenbanner · Slender goldenbanner · Lanceleaf Thermopsis · Allegheny Mountain goldenbanner · Mountain goldenbanner · Prairie thermopsis · Showy goldenbanner · Aaron's rod · Goldenbanner
Text excerpted from the Wikipedia article Thermopsis macrophylla 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.
