Title: Biblio RTF Export
Author: Biblio 7.x

G. B.  Ownbey, ?Natural Hybridization in the Genus Cirsium-I. C. discolor (Muhl Ex. Willd) Spreng X C. muticum Michx?, Bulletin of the Torrey Botanical Club, vol. 78, pp. 233-253, 1951.