Article: Intermountain Flora: Vascular Plants of the Intermountain West, U.S.A. Subclass Magnoliidae–Caryophyllidae, Vol. 2A Intermountain Flora: Vascular Plants of the Intermountain West, U.S.A. Subclass Magnoliidae–Caryophyllidae, Vol. 2A. N.H. Holmgren, P.K. Ho