» TRIANDRIA.— DIGYNIA. 



11. A. virginica: culms numerous, procumbent at the 



base, assurgent ; leaves subdistichous, involute, 

 rigid ; panicles lateral and terminal, spike-form ; 

 the lateral ones concealed ; calyx equal, about as 

 long as the corolla. 

 HAB. Sandy soils. Sept.— Oct. © ? A foot high ; 

 leav . hairy at base ; sheaths swelled ; stip.O; anth. 

 purp. 



12. A. longifolia: panicle contracted, spiked, generally 



concealed ; corolla much longer than the calyx, 

 subequal, smooth and spotless, without awns .; 

 leaves very long, filiform and recurved at the apex. 

 HAB. Sandy hills and fields. Sept.— Oct. If. Culm 

 2 — 4 ft. high; simple, terete; leaves 2 ft. long; 

 pan. sometimes exserted ; fl. compress. 



13. A. clandestina: panicle spiked, partly concealed: 



corolla unequal, much longer than the calyx, hairy 

 and spotted, slightly awned ; leaves very long. 

 HAB. Dry hills. Sept. H . Culm 2 ft. high, terete ; 

 pan. often sooty ; glum, carinate. 



54. CINNA. 



C. arundinacea : panicle large, capillary, loose ; 



leaves broad-linear ; culm smooth. 

 HAB. Swamps and wet woods. Aug. — Sept. H 



Culm 2—bft. high ; leav. pale green ; fl. green. 



55. POLYPOGON. 



P. racemosus : panicle dense, conglomerate, inter- 

 rupted ; bristles of the calyx scabrous ; corolla un- 

 armed, hairy at the base ; culm branched. 



HAB. Bog-meadows. Aug.— Sept. If.. Culm 3— 4 

 ft. high, compress.; branch, appress. ; leav. flat : 

 pan. 2 in. long. 



56. TRICHOCHLOA. 



T. capillaris : leaves convolute, filiform, smooth; 



panicle diffuse, capillary, very slender ; pedicels 



longer than the awns ; awns 3—4 times the length 



of the flower. 

 HAB. Sandy pine woods. Sept.— Oct. If. Cespi* 



lose, 2 ft. high, slender; pan. long, purple, very 



lender. 



