Filled with the exceptionally fine drawings that characterize the entire series, this installment of the Intermountain Flora series, written by Noel H. Holmgren, Patricia K. Holmgren, & the late Arthur Cronquist, covers a great many of the most difficult families found in the flora of the intermountain region. The largest families are Rosaceae, Onagraceae, Apiaceae, Saxifragaceae, & Euphorbiaceae.