Аннотация:[Construction of the primary conducting system of stem of some species of Amaranthus L.]
As a result of investigation of 10 Amaranthus species of 2 sections it has been concluded that all of them have the same plan of the primary conducting system structure that realizes imperfectly in the species of Blitopsis section. Three modes of the foliar trace bundles connection other stem bundles leading to the formation of the open conducting system (two modes) or the closed one (one mode) have been revealed. The latter is considered to be the most perfect. The so-called peripheral bundles are considered to be the part of the secondary stem conducting system.