A review of Desmodium s.l. (Leguminosae, subfamily Papilionoideae) in Singapore and nomenclature updates in the Malay Peninsula

All Desmodium Desv. species previously included in the most recent published checklist for Singapore have been recently transferred to Grona Lour. Desmodium scorpiurus (Sw.) Desv. and Pleurolobus gangeticus (L.) J.St.-Hil. are reported here as non-native new records for Singapore. An identification key to the species of the Desmodium group in Singapore is provided. Descriptions are provided for the new records based on the Singapore specimens. A lectotype is designated for Desmodium polycarpon var. albiflorum Ridl. which is reduced to synonymy of Grona heterocarpos (L.) H.Ohashi & K.Ohashi subsp. heterocarpos var. heterocarpos. Second step lectotypifications are designated here for Hedysarum heterophyllum Willd. and Hedysarum scorpiurus Sw. 30 species names in tribe Desmodieae for the Malay Peninsula with updated nomenclature is given.