. Flowers, fruits and leaves. Botany; Flowers; Seeds; Leaves. 114 STRUCTURE OF LEAF. [chap. Hence we see how beautifully the whole form of these leaves is adapted to the mode of growth of the trees themselves and the arrangement of their buds. Before we proceed to consider the next series of species to which I wish to direct attention, it will be necessary for me to say a few words on the micro- scopical structure of the leaf. Although so thin, the leaf consists of several layers of cells. Speaking roughly, and as a general rule, we may say that on each side is a thin membrane, or epidermis, u
. Flowers, fruits and leaves. Botany; Flowers; Seeds; Leaves. 114 STRUCTURE OF LEAF. [chap. Hence we see how beautifully the whole form of these leaves is adapted to the mode of growth of the trees themselves and the arrangement of their buds. Before we proceed to consider the next series of species to which I wish to direct attention, it will be necessary for me to say a few words on the micro- scopical structure of the leaf. Although so thin, the leaf consists of several layers of cells. Speaking roughly, and as a general rule, we may say that on each side is a thin membrane, or epidermis, underneath. Fig. 72.—Maple leaves on Chestnut. which on the upper side are one or more layers of elongated cells known from their form as " pallisade cells," beneath which is a parenchymatous tissue of more or less loose texture. The leaf is strengthened by ribs of woody tissue. From this general type there are, of course, numerous variations. For instance, many water plants have no epidermis. The structure of the leaf has been described in a number of memoirs by Bonnet, Haberlandt, Areschoug, Stael, Pick, Hein- richer, Vesque, Tschirch, Hentig, and other 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 Lubbock, John, Sir, 1834-1913. London : Macmillan
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Keywords: ., bookcentury1800, bookdecad, booksubjectbotany, booksubjectflowers
