Oenothera nuttallii Sweet
Family: Onagraceae
Nuttall's evening-primrose, white evening-primrose
Oenothera nuttallii image
Robert E. Lee  
Etymology: Oenothera: from Greek oinos, "wine," and thera, "to imbibe," because an allied European plant was thought to induce a taste for wine
Plants: erect, perennial, 12"-32" tall forb; stems with white, peeling bark near the base
Leaves: linear to oblong, alternate
Flowers: white to turning pink, 4-parted, 1/2"-2" wide, nodding before opening, unpleasant odor; inflorescence of stalkless flowers in the upper leaf axils; blooms June-July
Fruits: linear to oblong capsule, seeds without tufts of hair at the top
Conservation Status: Introduced - adventive