Notes on Hanstein’s Researches on the Development of the Embryo in Monocotyledons and Dicotyledons (Die Entwicklung des Keimes der Monokotylen und Dikotylen, von Dr. Johannes Hanstein, ‘Botanische Abhandlungen, Heft 1)

Abstract

ABSTRACT In Cryptogams the tissues at the growing-point of a stem or root always form by division from a single apical cell. Hanstein, in his researches on the development of the tissues at the growing-point of the stem of Phanerogams, found that the tissues were developed, not from a single apical cell, as in Cryptogams, but from a tissue of similar cells. In only two cases did he trace back the development to the embryo in the seed. The question, therefore, still remained to be answered as to when the separation of the different meristem layers took place in the embryo, and whether the cells formed from a tissue or a single apical cell.