An account of Alyxia Banks ex R. Br. in Malesia in which in all 57 species are distinguished, eight varieties (7 new), and one new subspecies. Twelve new species are proposed, one new combination, and one new name. Several species have been reduced. Two genera have been merged with Alyxia, viz. Paralstonia Baill. and Discalyxia Markgr. The species are grouped according to their presumed natural affinity in 12 series and 2 subseries. Keys are given to all series, subseries, species, and varieties. The revision is concluded with a list of names of insufficiently known species and one of excluded names.