1118232 96532 Asclepias macrotis Torrey
W.H. Emory, Rep. U.S. Mex. Bound., vol. 2(1): (Botany of the boundary): t. 45 (1859)
1256632 96532 Asclepias macrotis Torrey
W.A. Bell, M.B. Cantab, New Tracks N. Amer., vol. 1 : t. 1 (1869) [W.G. Smith]
2089896 474904 Goniopteris macrotis (Hook.) Pic. Serm. [125 698806 Nephrodium macrotis Hook.]
W.J. Hooker, Sp. Fil., vol. 4 : p. 86, t. 242, fig. B (1862) [W.H. Fitch]