3389125 967351 Spigelia scabrella Benth. 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. 52][Real Jardin Botanico no. 52] ()
 
3406745 967351 Spigelia scabrella Benth. M. Sessé, M. Mociño, Draw. Roy. Exped. New Spain: [Hunt instutute, Turner collection no. 1679] (1787-1803)