E.J.Palmer & Steyerm. (Wiegand) 1935 - Palmer EJ, Steyermark JA (1935) An Annotated Catalogue of the Flowering Plants of Missouri. Annals of the Missouri Botanical Garden 22(3): 375. doi: 10.2307/2394215.
There is no corrections for Triosteum aurantiacum var. illinoense yet.