5 967351 Spigelia scabrella Benth. Gentianaceae 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] ()
