Essential oils of Mosla chinensis Maxim from Hubei and Jiangxi provinces were extracted with steam distillation, separated and detected by GC-MS in combination with heuristic evolving latent projec- tions （HELP）. Meanwhile, comparative analysis of volatile components of the samples tested was done. In total ,37 compounds were identified ,35 for Hubei sample, and 19 for Jiangxi sample, respectively account- ing for 95.16% and 96.40% of the total content. The major constituents of the samples tested were thy- mol, D-1imonene, beta-...
