The article deals with the scientific expedition of Khorezm oasis, organized in 1925 under the leadership of academician N. Vavilov. It is noticeable that Khorezm is a historical agrarian country, which has a high agricultural culture. The researcher N. Vavilov, studying the numerous materials gathered by the participants of the expedition, has brought more than 80 types of agricultural plants of Khorezm oasis, besides there were described characteristics of some plants.