1903222 510754 Heteropogon contortus (L.) P. Beauv. ex Roemer & Schultes [80 59373 Andropogon contortum L.] Grasses of the Southwest (= Illustrations of North American grasses vol. 1) , vol. 1(1): : t. 16 ()
 
177782 M.V. Walcott, N. Amer. Wild Fl., vol. 2 : t. 101 (1925-1927)
 
1778022 758257 Pedicularis contorta Benth. M.V. Walcott, N. Amer. Wild Fl., vol. 2 : t. 121 (1925-1927)
 
1919646 510754 Heteropogon contortus (L.) P. Beauv. ex Roemer & Schultes [125 59373 Andropogon contortum L.] J.M. Wood, M.S. Evans, Natal Pl., vol. 2 : t. 121 (1899)