Helianthus angustifolius Linnaeus , Species Plantarum 2 : 906. 1753 Chapter 7: Linnaean Plant Names and their Types (part H) Jarvis, Charlie L. Linnaeus 1753 Magnoliopsida Asteraceae Helianthus Plantae Asterales Tracheophyta species angustifolius      Helianthus angustifoliusLinnaeus,  Species Plantarum2: 906. 1753.  "Habitat in Virginia." RCN: 6547.   Lectotype(Heiser & al. in Mem. Torrey Bot. Club22(3): 183. 1969): Clayton 13(BM-000032582).   Note:Watson (in Pap. Michigan Acad. Sci.9: 336. 1929) referred to material at LINN as the type, though it is unclear which sheet was intended. There is no suitably annotated sheet under  Helianthus, though there is sheet 1025.9 (under Rudbeckia). However, this material came from David van Royen, certainly after 1753, and it cannot be original material for the name. Fernald (in Rhodora49: 190. 1947) regarded a Clayton specimen as the type. However, from his illustration (pl. 1084, f. 1) it is clear that he intended Clayton 667(which is original material for  Coreopsis angustifoliaL.but not for this), and not Clayton 13(which is original material for  H. angustifolius). Heiser & al. (in Mem. Torrey Bot. Club22(3): 183. 1969) stated "(T: Virginia, Clayton)", adding (p. 186) that the photo they had seen from BM "bearing the annotation as the type of  H. angustifoliusshows a plant with much broader leaves [than Clayton 667]". It seems clear they regarded Clayton 13as the type. See Reveal & al. (in Huntia7: 223. 1987), who recognised Fernald'serror.