Thermopsis montana
Golden Banner or Golden Pea
A Colorado Native Montane to Subalpine Species
Fabaceae or Pea Family
18 to 24 inches tall - yellow
Full sun to part shade
Ordinary garden soil
Propagate by seed or division
Photos by Jane Hendrix

Golden Banner spreads rapidly by (underground) rhizomes so if you choose to put it into a formal garden, you'll have to keep an eye on it so it doesn't overrun less aggressive species.