Tetracentron hopkinsii
... that the Eocene leaf species Tetracentron hopkinsii was not confirmed from Washington state until 2018?
... that the <a href="./Eocene" id="mwAtw" rel="mw:WikiLink" title="Eocene">Eocene</a> leaf species <i id="mwAt0"><b id="mwAt4"><a href="./Tetracentron_hopkinsii" id="mwAt8" rel="mw:WikiLink" title="Tetracentron hopkinsii">Tetracentron hopkinsii</a></b></i> was not confirmed from <a href="./Washington_(state)" id="mwAuA" rel="mw:WikiLink" title="Washington (state)">Washington</a> state until 2018?