Abstract
The primary root has 2 histogens. Secondary roots are produced by the activation of peri-cycle and endodermis. Transition, a modification of type A of Eames and MacDaniels, occurs in the hypocotyl and the bases of the cotyledon and epicotyl, and is complicated by the horizontal growth of the base of the epicotyl to form a part of the rhizome. The bases of successive aerial stems, which arise from buds in the axils of the first scale leaves of the preceding aerial stems, grow horizontally to continue the rhizome. The scale leaves subtend the cladophylls which are stem structures morphologically.

This publication has 1 reference indexed in Scilit: