186 BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE. 



glumes narrow, acuminate, 1 -nerved, usually longer than the floret; 

 lemmas narrow, 3-nerved, the lateral nerves near the margin, the 



FIG. 110. Toothache grass, Campulosus aromaticus. Plant, X \ ', splkelet and fertile 



floret (palea side up), X 5. 



apex minutely bifid, bearing between the teeth a slender awn, or 

 rarely awnless. 



