Figure 1 from: 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

Figure 1 - A Penstemon luculentus in its commonly found native whitish or tan shale habitat B An individual Penstemon luculentus plant growing in its typical shale habitat.