. Elementary biology; an introduction to the science of life. Biology. FRUIT AND SEED DISTRIBUTION 317 the appearance of holes. The pods of the bean family and of the evening-primrose family illustrate this dehiscence, and the poppy is a good example of the formation of pores. Fleshy fruits often drop off, carrying the seeds with them, and the seed escapes when the fleshy part of the fruit is eaten by some animal or rots (that is, is eaten by some plant).. Fig. 145. Seeds scattered by the wind /, dandelion : 2, milkweed : ?, white maple ; 4, prickly ; j. thistle Many fruits, however,
. Elementary biology; an introduction to the science of life. Biology. FRUIT AND SEED DISTRIBUTION 317 the appearance of holes. The pods of the bean family and of the evening-primrose family illustrate this dehiscence, and the poppy is a good example of the formation of pores. Fleshy fruits often drop off, carrying the seeds with them, and the seed escapes when the fleshy part of the fruit is eaten by some animal or rots (that is, is eaten by some plant).. Fig. 145. Seeds scattered by the wind /, dandelion : 2, milkweed : ?, white maple ; 4, prickly ; j. thistle Many fruits, however, do not permit the seeds to escape; the fruit and the seed are so closely united that they constitute a structure that acts as a whole — as in the grains, the nuts, and the nutlets of the dandelion family (Fig. 145, i, 4, and 5). 372. Seed distribution. In their dehiscence many fruits open so suddenly that they shoot the seeds to a distance of a yard or more. This shooting is commonly brought about by the rapid twisting of the parts of the pod, as in the touch- me-not and the lupine (see Fig, 144). Most plants depend upon outside agencies to scatter their seeds for them. The wind is active in the case of species whose seeds are either very small (the orchids) or have. 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 Gruenberg, Benjamin C. (Benjamin Charles), 1875-1965. Boston New York [etc. ] Ginn and company
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