The status and origin of the species Pelargonium adulterinum L'Hér. (Geraniaceae) from the Western Cape of South Africa and its correct authorship are discussed. It is shown that L'Héritier not Aiton is the author of the name. A lectotype originating from L'Héritier's herbarium is designated on a collection kept in Candolle's herbarium (G-DC). The later name P. semitrilobum Jacq. is shown to be synonymous and a lectotype is designated originating from Jacquin's collections now in Vienna (W).
