Get A Photographic Guide to Wild Flowers of South Africa PDF

By Braam Van Wyk

ISBN-10: 1868723909

ISBN-13: 9781868723904

Включая 265 наиболее обычных южноафриканских дикорастущих вида, книга фокусируется на цветах, которых можно часто встретить вдоль дорог, на открытых пространствах, в национальных парках и на популярных прогулочных маршрутах. Книга дополнена исторической, медицинской и культурной информацией о характеризуемых цветах.
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Extra info for A Photographic Guide to Wild Flowers of South Africa

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C Lower part of embryo sae (wholemount) with proembryo and free-nuc1ear endosperm. D Proembryo from C. E Embryo sae (wholemount). Note the proembryo with a long suspensor; endosperm ornitted. F Proembryo with a highly eoiled, uniseriate, suspensor with eoenoeytie eells, from E. G Older ovule, the proembryo has a long suspensor. H, H' Proembryo with suspensor from G. The uninueleate eells at the tip (0, F, H') are progenitors of the embryo proper. (After Saehar 1956) 1 Embryology: Then and Now 35 e suspensor Fig.

In view of the faet that fertilization occurs and triploid endosperm develops, it is likely that, rarely, one of the synergids of an aposporous embryo sae may also be fertilized, and develop into an embryo which may account for a triploid seedling. In any ease, a critical study is ealled for to determine if any embryo ever develops from the endospermo Until then we eonsider that Muniyamma's claim is unjustified. 1 Tambourissa The earpellary arrangement in Tambourissa (Monimiaeeae) reminds of gymnosperms.

7 D) the tip extends up to the stigml;l and then curves backwards so that it appears l-shaped. The lower end of the embryo sac invariably extends up to the hypostase. floribunda (Narayana 1958b) the upper end of the embryo sac develops a lateral caecum (which may sometimes branch) in the style (Fig. 7 E), and the lower end ruptures the tubular hypostase and grows beyond it. This is not reported in any other taxon. 7. A Atkinsonia Iigustrina, 10ngisection of ovary showing mature embryo saes. B Amyema miquelii, tip of embryo sae with egg apparatus and upper po1ar nuc1eus, at two-thirds the height of style.

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A Photographic Guide to Wild Flowers of South Africa by Braam Van Wyk


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