All of them may be awned as in Chloris or only the fourth glume as in Andropogon.
In Panicum it is nearly two-thirds or less than the third glume.
The third glume is chartaceous to sub-coriaceous and paleate.
The first glume is concave, 3- to 5-nerved (rarely 3- to 7-nerved).
The second glume is membranous, 1- to 5-nerved or nerveless.
The first glume is shorter than the second, ovate, obtuse, 7- to 9-nerved.
The second glume is equal to or shorter than the fourth, 5- to 7-nerved.
The fourth glume is coriaceous, lanceolate, bisexual or female.
The fourth glume is coriaceous, with a bisexual or female flower.
The fourth glume is as long as the third, ovate, obtuse, paleate.