Chapmannia Torr. & A.Gray Chapmannia Torr. & A.Gray, Fl. N. Amer. (Torr. & A. Gray) 1(2): 355. 1838 sec. Thulin 1999=Pachecoa Standl. & Steyerm., Publ. Field Mus. Nat. Hist., Bot. Ser. 23: 12. 1943 syn. sec. Thulin 1999