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 Sisymbrium pyrenaicum Linnaeus , Systema Naturae , ed. 10, 2 : 1132. 1759 , nom. illeg. ["Habitat in Pyrenaeis, Helveticis alpibus."] Sp. Pl., ed. 2, 2: 916 (1763). RCN: 4779. Lectotype ( Lopez Gonzalez in Anales Jard. Bot. Madrid 52: 102. 1994): Herb. Linn. No. 836.4 ( LINN ) . Current name: Rorippa islandica (Gunnerus) Borbas ( Brassicaceae ). Note: See extensive discussion on the correct name for this taxon by Lopez Gonzolez (in Anales Jard. Bot. Madrid 52: 102. 1994). He indicates 836.4 (LINN) as the lectotype , allegedly following Ball (in Feddes Repert. 64: 14. 1962), and reproduces the Morison figure (as his f. 1 on p. 98). Although Ball discussed the identity of this sheet and the Allioni figure (probably Rorippa pyrenaica (All.) Rchb. ), he did not choose a type, concluding "As the name is illegitimate, the confusion and doubt as to the identity of this species does not have any serious nomenclatural consequences". It is illegitimate because it is a later homonym of S. pyrenaicum Loefl. (1758) .