TRIANDRIA— DIGYNIA. Ov 



Root creeping ; culm 18 in. high, erect ; leaves smooth j 



spike 6 in. long ; rach.Jlex. 

 L. temulentum : florets shorter than the calyx, as long 



as the bristle at their extremity ; root annual ; culm 



scabrous above. 

 HAB. Meadows. July. Root Jib. ; culm 2 ft. high : 



spikelcts much compress., 5 — 1-fl. 



86. ELEUSINE. 

 E. iiidica : spikes straight, erect, in pairs or quarter- 



nate ; rachis linear ; spikelets lanceolate, about b- 



flowered ; culm compressed, declined. 

 HAB. Cultivated grounds, and road-sides. July — 



Novem. 0. Culm 8 — 12 in. high ; leav. distichous ; 



$pik. gen. in pairs ; rach. compress. 



87. TRITICUM. Wheat. 

 T. (tstivum: spike parallel, compressed ; glumes 4- 



flowered, ventricose ; bristles generally much longer 



than the florets. 

 IIAB. In neglected fields. June. 0. Culm 3 — 4 ft. 



high ; rach. articulat. ; brist. 2 — 3 in. long. 



88. AGROPYRON. 



A. repens : spikelets oblong, 5-flowered ; glumes sub- 

 ulate, many-nerved ; florets acuminate ; leaves flat ; 

 root creeping. 



IIAB. Fields and cultivated grounds. July. U. Root 

 artic, white, very long ; culm 2 ft. high ; ft. some- 

 times with a short bristle, 



A . caninum: spikelets about 5-flowered, compressed ; 

 glumes 3-nerved, and, as well as the florets, armed 

 with a bristle at the tip ; root fibrous. 



IIAB. Delaware, li . Culm 9. — 3 ft. high ; spik. some- 

 times 6 -ft. : bristle longer than the flowers. 



80. SECALE. Rye. 

 S. cereale : glumes and bristles scabrous-ciliate ; co- 

 rolla smooth. 

 UAB. Neglected fields. June. or $. Culm 3—4 

 high : alum, ciliate, subulate ; bristle long 

 F2 



