Camissonia contorta   contorted suncup, plains evening-primrose
           (Alt: Oenothera contorta )
  
Onagraceae
sensitive                      herbaceous           
Distribution: Foothills, South Boise
Bloom: Apr - May

UW Burke Herbarium Link: Camissonia contorta
USDA Plants Link: Camissonia contorta   (CACO34)