Map showing known distribution of P. luculentus in Rio Blanco and Garfield counties Colorado.

 
 
  Part of: Johnson RL, Stevens MR, Johnson LA, Robbins MD, Anderson CD, Ricks NJ, Farley KM (2016) Molecular and morphological evidence for Penstemon luculentus (Plantaginaceae): a replacement name for Penstemon fremontii var. glabrescens. PhytoKeys 63: 47-62. https://doi.org/10.3897/phytokeys.63.7952