The bright green, glabrous leaves are broad and oblong, about 6 in.
The rice plant is an annual grass with long linear glabrous leaves, each provided with a long sharply pointed ligule.
The young shoots of P. domestica are glabrous, and the fruit oblong; in P. insititia the young shoots are pubescent, and the fruit more or less globose.
Petals are generally glabrous or smooth; but, in some instances, hairs are produced on their surface.
The outer glumes are acute and glabrous, the flowering glumes lance-shaped, with a comb-like keel at the back, and the outer or lower one prolonged at the apex into a very long bristly awn.
Further subdivisions are made, according to the presence or absence of awns (bearded and beardless wheats), the colour of the ears (white, fawncoloured or red), the texture of the ears (glabrous - i.e.