We have three British species of Wild Oat, but a knowledge of their structure and differences may be best obtained perhaps by a consideration of the cultivated Oat of our fields. It is indeed probable that the cereal oat is but a cultivated form of our Common Wild Oat (A. fatua), for Professor Buckman succeeded years ago in obtaining as the ninth generation from seeds of A. fatua good crops of the farmers’ varieties called White Tartarian and Potato Oats. It is known that oats shed in harvesting often degenerate into the wild forms. As a cereal the Oat does not appear to be nearly so ancient as wheat and barley, for it was not cultivated by the Hebrews, the Egyptians, Greeks or Romans. The genus is distinguished by having its flowers in a lax-panicle, the spikelets borne principally upon long, slender stalks. Each spikelet contains two or more flowers, of which the upper one is usually imperfect, and each is armed with a long twisted and bent awn. There are two outer glumes, each flowering glume deeply notched, the awn arising from the bottom of the notch. The pale is two-nerved, the scales two-toothed, the stamens three. The ovary has a hairy top and two short styles with feathery stigmas. The fruit adheres to the glume.
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