186 BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE. 
glumes narrow, acuminate, l-nerved, usually longer than the floret; 
lemmas narrow, 3-nerved, the lateral nerves near the margin, the 
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-¥Fiq. 110.—Toothache grass, Campulosus aromaticus. 
Plant, < 4; spikelet and fertile 
floret (palea side up), x 5. 
apex minutely bifid, bearing between the teeth a slender awn, or 
rarely awnless. 
