Caragana arborescens (Siberian Peashrub)
Family: Fabaceae (Pea)
  
Caragana arborescens grows as a shrub or small tree. Flowers are yellow. Sharp spines grow at the base of the leaves. The pinnately compound leaves have an even number of leaflets, lacking the terminal leaflet found on most Fabaceae species. The plant has been introduced as a drought tolerant species for windbreaks and landscaping. It escaped cultivation and has the potential to become invasive.

Vegetation zone:  Plains, Foothills, Montane
Time of bloom:  May - July
Origin:  Introduced
Eastern Colorado Wildflowers