Abstract:This paper deals with the preliminary chemical analysis,thin layer chromotographic test and oleanolic acid as-say of the main medicinal species of Aralia. It has been established that both herbaceous and woody species of Ar- alia contain saponin and β-sitosterol.Therefore the idea“Chemical taxonomy of herbaceous taxon and woody taxonof Aralia can be based on the presence or absence of saponin and β-sitosterol”is incorrect.An assay of differentspecies has shown that certain species have high content of oleanolic acid and thus higher economic value. Based onthe assay of samples of the same species collectedein different stages of growth rational collecting periods are sug- gested.