Abstract
A new species of Desmodium (Leguminosae), D. brevipedicellatum W.Saisorn, Chantar. & Balslev from Thailand and Laos is described and illustrated. Two taxa, D. concinnum DC. and D. laxiflorum DC. subsp. lacei (Schindl.) H.Ohashi, are reported as new for Thailand. Lectotypes of D. amoenum Wall. ex Benth. and D. penduliflorum Wall. ex Benth. are designated.