Vol. 2, pt. B by: Noel H. Holmgren, Patricia K. Holmgren, Arthur Cronquist.
Vols. 2, pt. B; 3-5 published by the New York Botanical Garden.
Vol. 6 published by Columbia University Press, New York.
v. 1. Geological and botanical history of the region, its plant geography and a glossary. The vascular cryptogams and the gymnosperms -- v. 2, pt. A. Vascular plants of the Intermountain West, U.S.A., subclasses Magnoliidae-Caryophyllidae -- v. 2, pt. B. Subclass Dilleniidae -- v. 3, pt. A. Subclass Rosidae (except Fabales) -- v. 3, pt. B. Fabales -- v. 4. Subclass Asteridae (except Asteraceae) -- v. 5. Asterales. -- v. 6. The monocotyledons.