Irish botanist and researcher.
Jennifer Claire McElwain, MRIA, is an Irish researcher and educator, specialised in palaeobotany. She is a full professor in the Trinity College Dublin's (TCD) School of Natural Sciences, holding the 1711 Chair of Botany. She is also the Director of the Trinity College Botanic Garden. McElwain held the position of Assistant Curator of Paleobotany at the Field Museum of Natural History in Chicago between 2000 and 2003 and later that of Associate Curator of Paleobotany from 2003 until 2006.