Rhus boothillensis
…found in the Klondike Mountain Formation. Rhus boothillensis likely hybridized with the other Klondike Mountain formation sumac species Rhus garwellii, Rhus malloryi, and Rhus republicensis. Rhus boothillensis is known from specimens which are recovered from an outcrop of the early Eocene, Ypresian Klondike Mountain…