title: Numerus, figura, proportio, situs; Linnaeus's definitory attributes.
authors.affiliation: Department of Environmental and Evolutionary Biology, University of Liverpool.
authors.forename: A J
authors.initials: AJ
authors.lastname: Cain
mesh_terms: D001901:Botany / Q000266:history*; D049671:History, 18th Century; D013548:Sweden; D009626:Terminology as Topic