Nepeta cataria (Catnip)
Family: Lamiaceae (Mint)
  
Catnip is a widespread weed of the plains and foothills. A member of the Mint family, it has square stems and toothed, triangular leaves. Flowers appear at the top of the stem and are white with pink spots.

Vegetation zone:  Plains, Foothills
Time of bloom:  June - September
Origin:  Introduced
Eastern Colorado Wildflowers