Ptilostemon casabonae, Taxa Only, Exact Match: 2 Treatments

Ptilostemon casabonae			J. A. Devesa, A. Quintanar, M. A. Garcia & S. Castroviejo, 2014, Flora Iberica / Vol. XVI (I): Compositae (partim), Madrid: Real Jardín Botanico, CSIC : 123-124	123-124
Ptilostemon casabonae			Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part C), Order out of Chaos. Linnaean Plant Types and their Types, London: Linnaean Society of London in association with the Natural History Museum, pp. 370-473 : 384	384