Chapter 7: Linnaean Plant Names and their Types (part S) Author Jarvis, Charlie Department of Botany, Natural History Museum, Cromwell Road, London, UK text 2007 Linnaean Society of London in association with the Natural History Museum London Order out of Chaos. Linnaean Plant Types and their Types 806 877 book chapter https://doi.org/10.5281/zenodo.291971 978-0-9506207-7-0 291971 Swertia difformis Linnaeus , Species Plantarum 1 : 226. 1753 . "Habitat in Virginia." RCN: 1855. Lectotype (Blake in Rhodora 17: 51. 1915): Clayton 171 (BM-000038852). Current name: Sabatia difformis (L.) Druce ( Gentianaceae ).