. . "Gentianales" . "Feltleaf Bluestar" . "Amsonia" . . "Woodson" . "Apocynaceae" . . . . . . . "Amsonia tharpii" . . "Plantae" . . . . "Amsonia tharpii Woodson" . "Magnoliopsida" . "Magnoliophyta" . .