living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Plantae Haeckel (1866) - plants
       Subkingdom Embryobionta Cronquist, Takht. & W.Zimm.
         Division Magnoliophyta Cronquist, Takht. & Zimmerm. (1966) see Phylum Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996)
           Class Magnoliopsida Brongn. (1843)
             Subclass Asteridae Takht. (1967) see Superorder Asteranae Takht. (1967)
               Order Scrophulariales Lindl. (1833) see Order Lamiales Bromhead (1838)
                 Family Scrophulariaceae Juss. (1789), nom. cons. - figwort family
                   Genus Penstemon Schmidel (1763)
                     Penstemon speciosus Dougl. ex Lindl. - prairie-clover