"Plantae" . . . "Caryophyllales" . . . "Chorizanthe angustifolia" . . . "Polygonaceae" . . . "Narrowleaf Spineflower" . . "Magnoliopsida" . . "Magnoliophyta" . "Chorizanthe" . . . . . "Nutt." . "Chorizanthe angustifolia Nutt." .