Phlox caespitosa Nutt.  

Family: Polemoniaceae

Clustered Phlox, more...Stiff Phlox

[Phlox caespitosa subsp. eucaespitosa, morePhlox douglasii Hook., Phlox douglasii subsp. eudouglasii , Phlox douglasii var. caespitosa (Nutt.) H. Mason ex Jeps., Phlox douglasii var. douglasii Hook.]