WBetula leopoldae
WCimbrophlebia
WComptonia columbiana
WDinokanaga
WDipteronia brownii
WEorpa (genus)
WFlorissantia (plant)
WGinkgo dissecta
WLangeria
WMacabeemyrma
WMetasequoia occidentalis
WMyrmeciites
WPlecia canadensis
WUlmus okanaganensis
WYpresiomyrma