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Little Wanderers

Chapter 20: SEEDS THAT FLY WITHOUT WINGS OR PLUMES.
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About This Book

A child-oriented natural-history guide explains how plants send their seeds abroad and why dispersal matters. It groups dispersal strategies—light plume-bearing and winged seeds carried by wind, seeds that float or tumble, sticky burs that cling to animals, edible seeds transported by creatures, and pods that eject their contents—and describes the forms and processes that enable each method. Common examples such as dandelions, thistles, maples, burdocks, cotton, various nuts, and touch-me-not illustrate the mechanisms, while brief reflections contrast sedentary adult plants with their wandering seed offspring and note the ecological advantages of travel.

SEEDS THAT FLY WITHOUT WINGS OR PLUMES.

Poppy seeds have no wings and no plumes, and yet they are carried far and wide by the wind. That is because they are so very small and so very light. They look more like dust than seeds.

Poppy pod.

The poppy pod is like a cup with a cover on, but around the edge, just below the cover, is a row of small holes, each covered by a lid. These lids do not open until the poppy seeds are ripe; then they do, and the fine seeds can get out of the holes. But how do they get out? They cannot move of themselves, but the wind sways the poppy pod this way and that on its long stalk, and the little seeds are shaken out only to be caught by the wind and blown away.

Perhaps you think that is not a very sure way for the seeds to escape, but if you examine a poppy head that has been ripe for some time you will find scarcely a seed in it, so it proves to be a better way than it looks.

Nature’s way is generally the best way to accomplish an object.

Poppies are often seen growing by the roadside or in the garden, far from the flower beds; that is because the wind has blown the seeds to these places.

In England the wheat fields are often gay with scarlet poppies, which have, no doubt, been sown with the wheat. They are beautiful to look at, though the farmer does not enjoy seeing them in his wheat.

Opium is obtained from the juice of the partly ripened seed pods of some kinds of poppies. Opium is very valuable as a medicine, but it has to be used with great care, as it is also a powerful poison.

A valuable oil is expressed from the seeds of the opium poppy. This oil is used for illuminating purposes in some parts of the world, and also for soap-making. The finer quality is used as food, instead of olive oil, in countries where oil is eaten instead of butter, and it is also used in grinding artists’ colors.