Electro-physiology electrophysiolog02bied Year: 1896-98 VI ELECTROMOTIVE ACTION IN VEGETABLE CELLS consists of two distinct lobes, which, like the wings of the petiole, are attached to the highly convex mid-rib. At its margin the leaf is prolonged at tolerably regular intervals into bristle-like processes, which hook together alternately when the lobes are folded up. On the surface of each lobe are three small hairs, one FIG. 139. near the mid-rib, the other two somewhat external to it, and these are essentially the seat of excitability. The inner surface of the leaf is further provided w
Electro-physiology electrophysiolog02bied Year: 1896-98 VI ELECTROMOTIVE ACTION IN VEGETABLE CELLS consists of two distinct lobes, which, like the wings of the petiole, are attached to the highly convex mid-rib. At its margin the leaf is prolonged at tolerably regular intervals into bristle-like processes, which hook together alternately when the lobes are folded up. On the surface of each lobe are three small hairs, one FIG. 139. near the mid-rib, the other two somewhat external to it, and these are essentially the seat of excitability. The inner surface of the leaf is further provided with a number of small discoid glands. The wings of the petiole consist of a soft unstable tissue, while the lobes are lumpy, sappy, and highly resistant. Lateral veins run out at approximately equal distances from the fibro-vascular bundle which passes up the centre of the mid- rib, and form an elegant system of arches at the margin of the
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