. A manual of structural botany; an introductory textbook for students of science and pharmacy. Plant morphology. 110 CARPOLOGY: FUNCTIONS AND STRUCTURE OF THE FRUIT winter use. The edible portion is in some cases, as in that of the banana, highly nutritious, while in others it is apparently eaten merely for its palatability or for its thirst-quenching properties. Sixcial Protection to Seeds of Edible Fruits.—Some special form of protection is commonly required for the seeds of edible fruits. That of the peach is enclosed in a hard stone, so that it shall not be abraded as the pulp is pecked o
. A manual of structural botany; an introductory textbook for students of science and pharmacy. Plant morphology. 110 CARPOLOGY: FUNCTIONS AND STRUCTURE OF THE FRUIT winter use. The edible portion is in some cases, as in that of the banana, highly nutritious, while in others it is apparently eaten merely for its palatability or for its thirst-quenching properties. Sixcial Protection to Seeds of Edible Fruits.—Some special form of protection is commonly required for the seeds of edible fruits. That of the peach is enclosed in a hard stone, so that it shall not be abraded as the pulp is pecked or bitten away. Those of the cherry and straw- berry are enclosed in similar hard coats, which resist the digestive process as well. The more or less laxative or purgative properties of many fruits doubtless contribute to such protection by the more prompt dejection of the seeds which is brought about by their Jm Fig. 301. Lappa fruit with prickly involucre. 302. Fruit of Geum with jointed style. 303. Fruit of Gaultheria, with fleshy calyx. 304. Of strawberry, with fleshy torus. 305. Of blackberry, with fleshy torus and ovaries. 306. Of cashew, with fleshy pedicel. 307. Of tamarind, with fleshy middle layer of pod. 308. Of apple, with fleshy calyx and disk. 309. Of papaw, with fleshy inner layer of ovary. 310. Of belladonna, with fleshy ovary. 311. Of fig, with fleshy hollowed end of branch. 312. Of watermelon, with fleshy placentae. Origin of Edible Portion.—The origin of the edible portion is vai'ious. In the strawberry (Fig. 304) it is the complete torus, and this only. In the blackberry (Fig. 305) such a torus is combined with a partially fleshy ovarian wall upon each of the ripened pistils. In the rose (Fig. 59) it is a similar torus, but hollowed, probably with other elements combined. In the apple (Fig. 308) it is a fleshy-thickened disk, together with the adnate calyx lined by it. In the checkerberry (Fig. 303) it is the calyx only which becomes fleshy. In t
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