Vasey, Contr. U. S. Nat. Herb. 1: 57. 
ther slender, rigid perennial about 3 dm. 
lumes, the first about one-half as 
uals the fi į 
marshes, ete., K e flowering glume (b). Thegrain is shown 
Cn. 
= à pra distinguished from 
Species by its very unequal empty glumes. 
