. Botany of the living plant. Botany; Plants. CHAPTER XXXVI. THE RELATION OF SIZE AND FORM IN PLANTS. The Obconical Form. Living Plants have now been considered in their various aspects of Form, Structure, Function, and Propagation. But there is still another point of view which emerges as the result of comparative measurement. A relation has thus been found to exist between Form and actual Size ; but hitherto its study has been almost wholly omitted from the general discussion of the plant-body. Moreover, there has been a very frequent neglect of uni- formity in scale of the illustrations use
. Botany of the living plant. Botany; Plants. CHAPTER XXXVI. THE RELATION OF SIZE AND FORM IN PLANTS. The Obconical Form. Living Plants have now been considered in their various aspects of Form, Structure, Function, and Propagation. But there is still another point of view which emerges as the result of comparative measurement. A relation has thus been found to exist between Form and actual Size ; but hitherto its study has been almost wholly omitted from the general discussion of the plant-body. Moreover, there has been a very frequent neglect of uni- formity in scale of the illustrations used in comparison, which has tended to obscure the issue. But once the relation between Size and Form is brought into view on a uniform scale of measurement for each example, many observed data acquire new meanings, both functional and evol- utionary. The discussion of this relation starts from the fact that green plants are accumulators of material gained by photosynthesis. They are in no equivalent degree expenders. Hence they naturally work to a favourable balance of material. As the surplus of supply is u up in the growth of a plant of primary development, which has polarity in relation to some fixed -tame, its outline tends to expand from the base upwards, and the plant takes a more or less obconical form, with the vertex or cusp directed downwards. A simple example of this type is seen in the young plant of Fucus (Fig. 445)- I* : 589. Fin. 4 Young "f 1' ncus MttCttJOMH in longitudinal and ⢠Rostafinsld.) The form is obconical, with circular transverse outline : it is only lata that it 1 â ⢠laterally oompreawd up- ward-. (Sei. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bower, F. O. (Frederick Orpen), 1855-1948; Wardlaw, C. W. (Claude Wilson), 1901-. London, Macmillan and Co. ,
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