Mosla (Benth.) Buch.-Hamilt. Ex Maxim. is a small genus (Lamiaceae) ranging from the west-Himalayas eastwards to Japan, and from the Far East of Russia southwards to Indonesia. Its speciation patterns are the key objective. The present dissertation reports the results of three-year-period ecological differentiation studies on this genus. Intensive field surveys and observation were conducted and thereafter 36 plots were sampled. The common garden experiment was made, and control experiments of soil water av...