Chapter 7: Linnaean Plant Names and their Types (part H) 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 557 585 book chapter https://doi.org/10.5281/zenodo.291971 978-0-9506207-7-0 291971 Helianthus laevis Linnaeus , Species Plantarum 2 : 906. 1753 . "Habitat in Virginia." RCN: 6546. Lectotype (Sherffin Publ. Field Mus. Nat. Hist., Bot. Ser. 16: 315. 1937): Clayton 195 (BM-000038865). Current name: Bidens laevis (L.) Britton ( Asteraceae ). Note: Sherff (in Bot. Gaz. 61: 504. 1916) stated that he had been unable to find Clayton 195 at BM, although it had previously been reported as present by Gray. Sherff subsequently designated it as the type.