Аннотация:[SOME INTERPRETATIONS OF MACHANISM OF THE ANOMALOUS SECONDARY THICKENING OF CENTROSPERMS]Some additional reasons in favour of the fact that the anomalous secondary thickening of the sclerenchym-bandlous type is carried out by the uninterrupted ring of the additional cambium some segments of which are periodically substituted by the new ones have been adduced. The latter arise as separate arcs whose ends join with the ring of the previous cambium.