Silphium asteriscus, Taxa Only, Exact Match: 2 Treatments

Silphium asteriscus var. asteriscus			Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part S), Order out of Chaos. Linnaean Plant Types and their Types, London: Linnaean Society of London in association with the Natural History Museum, pp. 806-877 : 852-853	852-853
Silphium asteriscus var. trifoliatum			Weakley, Alan S., Kees, John C., Sorrie, Bruce A., Ward, Scott G., Poindexter, Derick B., Brock, Mason, Estes, L. Dwayne, Bridges, Edwin L., Orzell, Steve L., Levin, Geoffrey A., McClelland, R. Kevan Schoonover, Schmidt, Ryan J. & Namestnik, Scott A., 2023, Studies In The Vascular Flora Of The Southeastern United States. Ix, Journal of the Botanical Research Institute of Texas 17 (1), pp. 191-257 : 237-238	237-238