Intermountain Flora: Vascular Plants of the Intermountain West, U.S.A. : Subclass Rosidae (Except Fabales): 3

This volume of the Intermountain Flora series covers a great many of the most difficult families found in the flora of the US Intermountain region, the largest of which are Rosaceae, Onagraceae, Apiaceae, Saxifragaceae, and Euphorbiaceae.