As an illustration of the caryopsis, the grain of Andropogon Sorghum may be studied.
caryopsis grooved, blunt and more tightly held in the palea.
caryopsis 7-8 mm., less flattened than in Bromus, with a shallow groove.
The caryopsis is very narrow, and the rachilla long and feathered with hairs.
The caryopsis is, however, much more slender than in Agropyrum.
The caryopsis is shorter and more ovoid than in other Bromes.
Aira is distinguished by the awn: Agrostis by the very different pale and caryopsis.
In Lolium and Agropyrum the caryopsis is still more wheat-like and grooved.
Although typical grasses form a caryopsis as described, exceptions occur.
Ovary 1-celled, 1-ovuled, forming a seed-like grain (caryopsis) in fruit.