184 



Fig. 178. CAMPULOSUS AROMATICUS I Walt. ) Trin. in Steud. Nom. ed. 2, 

 1 : 272. 1840. {JEgilops aromaiica Walt. Fl. Car. 249. 1788; Ctenium americanum 

 Spreng. Syst. 1 : 274. 182-5.) TOOTHACHE-GRASS.— An erect perennial 9-12 

 dm. (3°-4°) high, from strong, lemon-scented and pungent rootstocks, with 

 narrow leaves and usually a single, terminal, curved, pectinate spike 4-10 cm. 

 (l5'-4') long. Sheaths shorter than the internodes, rough; ligule 2 mm. (1") 

 long, truncate; leaf-blades 3-15 cm. (l'-6') long, 2-4 mm. (l"-2") wide, plane, 

 or involute, smooth. Spikelets (a) about 6 mm. (3") long, the second glume 

 bearing just above the middle a stout horizontal or recurved awn; third, 

 fourth, and fifth glumes [b) membranous, scabrou.s, awned from below the 

 2-toothed apex, the fifth subtending a perfect flower, the others empty.— 

 Southern Virginia to Florida and westward to Mississippi. July to August. 



