Transactions of the South African Philosophical Society, Vol. 18 (Classic Reprint)

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Excerpt from Transactions of the South African Philosophical Society, Vol. 18 The development of the ovule and embryo-sac in plants has been investigated very fully, especially during recent years, and the normal course of events has been thoroughly worked out in several cases. There are, however, in this species of Cassia, certain peculiarities of interest, which are described below. It has been found most conducive to a clear account to give all the stages of development, as far as they have been investigated, normal as well as abnormal. The species is a South American one, not native in Cape Colony, and the material has been obtained from private gardens in Cape Town. It is proposed to give a short account of the development from about the archesporial stage to the formation of the definitive nucleus in the eight-celled embryo-sac. The young ovule at about the archesporial stage is distinctly campylotropous (Fig. I.). No definite archesporial cell or cells are clearly recognisable, but one towards the centre, somewhat larger than the surrounding cells (M.M.C., Fig. I.), is probably the megaspore mother-cell just becoming differentiated. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.