The front opens and discharges the pollen away from the stigma; but it falls where insects seeking the honeyed glands (using the ovary as a perch) will get it upon their forelegs, and so attach if to the stigmas of the next flower they visit.
It flowers in August and September. This is the only British species.
Oat-grass (Avena sativa).
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.
which droop at length. The empty glumes with nine nerves, flowering glumes covered with stiff hairs. Brown awn much bent, the lower half twisted. Leaves flat and roughish; sheaths smooth. Cornfields. June to August.
II. Narrow-leaved Oat (A. pratensis). Perennial; not to be sought in the place