Ulmus okanaganensis Planera List of elm species Ulmus chuchuanus List of the Cenozoic life of North Dakota Ulmus mexicana List of the Cenozoic life of Montana List of the Cenozoic life of Wyoming List of elm synonyms and accepted names List of the Cenozoic life of California List of the Cenozoic life of Colorado Ulmus thomasii Ulmus crassifolia Ulmus alata Ulmus elongata Ulmus serotina Paleobiota of the Klondike Mountain Formation