Capsella genus --- MUSTARD SUBFAMILY 1 (GENUS A TO D) 

shepherd's purse (Capsella bursa-pastoris) -- in May -- Lory State Park, CO           white & cream       

shepherd's purse (Capsella bursa-pastoris) -- in April -- Waterfall Trail, Lory State Park, CO

shepherd's purse (Capsella bursa-pastoris) -- in May -- CSU Environmental Learning Center, Fort Collins, CO