*iRA. TRIANDRIA. DIGYNIA. 13S 



florets ; superior floret pedicellate ; inferior valve of the co- 

 rolla truncate, laciniate, with an awn a little below the middle 

 scarcely exserted. 



Root perennial. Culm 2 feet high, erect, with few leaves. Leaves 

 erect, flat, striate, scabrous on the margin. Sheaths smooth. 

 Seifiuie elongated, membranaceous. Panicle oblong or pyra- 

 midal ; lower branches about 5; the upper ones in threes. 

 Calyx unequal, somewhat membranaceous; the inferior glume 

 longe^, ovate, acute, 1 -nerved, scabrous on the keel; superior 

 valve linear. Florets hairy at the base ; the superior one on a 

 iiairy pedicel. Inferior valve of the corolla obtuse and lacerate 

 at the tip ; superior valve shorter, bifid. Stamens 3 ; anthers 

 linear, yellow. Styles very short; stigmas plumose, white. 

 Hab. On the shores of lakes Owasco and Onondaga, New- 

 York. August. Coofier. 



4. A. pumila Pursh: panicle small, fastigiate, few- 

 flowered; pedicels short ; florets awnless, obtuse, twice the 

 length of the cal^x; valves with membranaceous margins; 

 leaves flat, smooth ; culm erect, scarcely longer than the 

 leaves. Pursh Fl. 1. p. 76. Catabjiosa pumi/a Roem» 

 4' Schnlt. II. p. 696. 



Hooi perennial. Culm scarce an inch high, growing in close 



tufts. 

 Hab. In barren clayey soil, near brick-yards. Pennsylvania, 



June. Pursh. 



This grass, as far as I can learn, has not been found by any 



other botaniirt except Pursh. It is placed in the genus Ca- 



TABROSAt oiBeauvois, hy Roe 7ner is" S c h u It e s, but 



it cioes not appear to be a congener with C. aguatica, (Poa 



fiquaiica !>.) 



40. LOLIUM. L. 



Spikelets sessile on a rachis, many-flowered. Calyx 

 of one glume. Inferior valve of the corolla herbaceo- 

 membranaceous, mucronate, or with a short bristle 

 at the tip. Geiu pi 126. Nu 1 1. Gen. I. p. 89. 

 Juss. p. 31. Roem.^ Schult. Gen. 346. P. de 

 Beauv. t. XX. f. 3. Tr i ?u Agrost. 67. Spike com- 

 pound. Calyx in the uppermost spikelets 2-valved. 



Darnel. 



1, h. pereyme L. : florets much longer than the calyx, 



unarmed, linear-oblong, compressed ; root perennial. fVi 1 1 d. 



f Catabuosa, Cal. 2— 5-florus, flosculis brevior ut et valvula corolliiia 

 inferior subtruncata, eroso-denticulata, superior fere trifida. J\'ectaria Ian- 

 c'eolata. Germen subemarginatum. Stigmata subuspergilliformia. Semen 

 bicorue. Faincula comrosila. P. de ieav.v. .ij^roeS. p. 96. t. XIX, f 8. 



