Lactifluus (Pers.) Roussel
The ectomycorrhizal genus Lactifluus (Pers.) Roussel is the smallest of the two milkcap genera (Russulaceae). The genus is mainly distributed in the tropics and is well-represented in Thailand (Le et al. 2007; Stubbe et al. 2010; Van de Putte et al. 2010; De Crop et al. 2014). In a recent study (De Crop et al. subm.), the genus is revised and four subgenera are proposed: L. subg. Lactariopsis (Henn.) Verbeken, L. subg. Rugati (Pacioni & Lalli) Verbeken, L. subg. Gymnocarpi R. Helmex Verbeken and L. subg. Lactifluus (Pers.) Roussel. The two species from Thailand that are presented here belong to L. subg. Lactariopsis and L. subg. Rugati. The phylogenetic tree is presented in Fig. 1.

Fig. 1 Maximum likelihood tree of Lactifluus subg. Lactariopsis and L. subg. Rugati, based on ITS-LSU sequence data. Maximum likelihood bootstrap values >70 are shown. New taxa are in blue and species for which obtained sequences are based on type material have names in bold.
Species