Castilleja haydenii
Scrophulariaceae (Snapdragon Family)

The genus name, "Castilleja", honors Domingo Castillejo (1744-1793), Spanish botanist and Professor of Botany in Cadiz, Spain.  In the late 1770s Jose Celestino Mutis (who was born in Cadiz, Spain but spent most of his life in Columbia) named a new Columbian genus, Castilleja.  He sent the new species and name to Linnaeus' son who published the information in Supplementum Plantarum in 1781.

Ferdinand Vandeveer Hayden was a highly acclaimed surveyor of the Western United States who led numerous highly successful and widely publicized expeditions from 1867-1879.