ELEusiN^. TRIANDRIA. DIGYNTA. 135 



lets closely imbricate. Superior glume of the calyx 5-nervecl, 

 broader than the inferior. Corolla smooth ; the inferior valve 

 a third longer than the other, and rather obtuse. Stamens 3 ; 

 anthers yellow. Seed arillate, conspicuously corrugate trans- 

 versely. 

 Hab. Very common in cultivated grounds and about houses ; 

 even betvireen the stones of the pavements in the city of Nevvr- 

 York. July — November. A native also of India, Egypt, Japan, 

 and South-America. Wire-grass^ Yard-grass, £cc. 



42. TRITICUM. L. 



Flowers spiked. Spikelets sessile on the teeth of the 

 rachis, 3 — 4-fiowered, the 2 inferior florets opposite, 

 fertile ; the upper ones often abortive. Glumes broad, 

 boat-shaped, mucronate or armed. Inferior valve of 

 the corolla terminating in a bristle ; superior valve sub- 

 conduplicate. Nutt, Gen. I. p. 88. Roem. 'i£' 

 Schult. Gen. 348. P. de Beauv. t. XX. f 4. 

 Trin. Jgrost. \05. Tritici spp. L. JFheat. 



T. (Eotivvm L. : spike parallel, compressed ; glumes 

 4-flowered, ventricose ; bristles generally much longer than 

 the floret?. tVilld. Spec. I. p. 476. P ursh FL 1. p. 90. 

 Roem. ^ Schult. II. p. 761. 



i?oo? annual. Culm ^ — 4 feet high. ZfaTOd-s broad-linear, smooth. 

 Stifiule membranaccdus, sh'irt, truncate. S'fiike 3 — 6 inches 

 lonii; rachis articulated. Glumes bri)ad, and enveloping the 

 florets, mucronate. Inferior valve of the corolla terminating in 

 a scabrous bristle 1 — 3 inches long. 



Hab. In neglected fields ; scarcely naturalized. June. 



43. AGROPYRON. Gaertner. 



Flowers spiked. Spikelets sessile on the teeth of 

 the rachis ; 3 — 9-flovvered. Glumes lanceolate, cari- 

 nate. Inferior vah^e of the corolla mucronate, or ter- 

 minating in a subulate bristle. P. de Beauv. 1. c, 

 p. 101. t. XX. f. 42. Roe ?n. ^Schult. Gen. 347. 

 Trin.Agrost. 101. Tritici spp. L. 



1. A. repens P. de B. : spikelets oblong, 5-flowered ; 

 glumes subulate, many-nerved ; florets acuminate ; leaves 

 flat; root creeping. R o e m. '^ S c hull. U. p. 754. Tai- 

 TicuM repf.7is L. Willd. Spec. I. p. 481. Smith FL 

 Brit. T. p. 158. Eng. But. t. 909. fJ uhl. Gram. p. 195. 

 .8 i g. Bost. p. 27. 



