Box percentile plots showing variations among plant characteristics between P. fremontii, P. luculentus, and P. scariosus var. garrettii. Boxes delimit the 75th and 25th percentiles. The whiskers delimit the 10th and 90th percentile with outliers shown as circles outside the whiskers. The horizontal bar shows the 50th percentile and the horizontal triangle is the mean.

 
 
  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