338907 6 556857 Ipomoea longifolia Benth. [556857-556857-1455187] M. Sessé, V. Cervantes, M. Mociño, Drawings from the Spanish Royal Expedition to New Spain (1787–1803) (to be published in the Flora Mexicana, Real Jardin Botanico, Madrid, Spain): t. 47][Real Jardin Botanico no. 47] ()
 
285102 556857 Ipomoea longifolia Benth. J. Lindley, Edwards’s Bot. Reg., vol. 26 : t. 21 (1840) [Drake]