The identity, typification and nomenclature of three Linnaean names referable toLeucas(Lamiaceae) from India

The species of Lamiaceae described in 1753 by Linnaeus asPhlomis zeylanicaL. (=Leucas zeylanica(L.) R.Br.) andPhlomis indicaL. (=Leucas indica(L.) R.Br.) are distinct. The neotype designated forPhlomis indicaL. belongs to a different taxon, hence a specimen from the Linnaean Herbarium (LINN) is redesignated as neotype.Leucas lavandulifoliaSm. is the legitimate name for the Linnaean speciesLeonurus indicusL. The south Indian endemic varietyLeucas lavandulifoliavar.decipiens(Hook.f.) Chandrab. & S.R.Sriniv. is neotypified. A key to the four taxa is provided.