The structure of the primary bark of the stem at the 8 species of 4 sections Climacoptera growing in Mirzachul (C. intricata, C. longistylosa), Kyzylkum (С. ferganica, C. lanata), Ustyurt (C. affinis, C. transoxana, C. turgaica, C. aralensis). Allocated 2 groups of species: Remember to primary bark (C. intricata, C. longistylosa, С. ferganica, C. lanata), which is associated with the early completion of the life cycle and halomorphic with no conservative primary bark (C. affinis, C. transoxana, C. turgaica, C. aralensis), laying the phellogen that is associated with a longer life cycle and xeromorphic. The structure of the primary bark is more related to the environment than the sectional affiliation.