Oat
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The oat, sometimes called the common oat, is a species of cereal grass grown for fodder and for its seed, which is known by the same name. Oats appear to have been domesticated as a secondary crop, as
Oat spikelets, containing the small wind-pollinated flowers
Panicle with spikelets containing seeds
1 A. sterilis, 2 A. sativa, spikelet and base of outer grain of both cultivated species
Groat (grain)
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Groats are the hulled kernels of various cereal grains, such as oats, wheat, rye, and barley. Groats are whole grains that include the cereal germ and fiber-rich bran portion of the grain, as well as
Groats mix
From the top: fine, medium, and coarsely cut oat groats (i.e. steel-cut oats) Bottom: uncut oat groats
USDA wheat