GRAMINE^E. 397 



HAB. Wet meadows. Perm, to Geor. Sept. 21. Plant very 

 smooth. Culm 2 4 feet long, succulent. Leaves a foot or 

 more long. Panicles large and pyramidal. 



20. P. capillare Linn. : culm nearly, simple ; sheaths very hairy ; 

 panicle large, capillary, expanding, loose ; spikelets on long peduncles, 

 acuminate, smooth ; abortive floret 1-valved. 



a. sylvaticum Torr. : culm branched at the base, very slender ; 

 leaves linear. 



HAB. Cultivated grounds. Can. to Flor. Var. a. Dry woods. 

 N. Y. Aug., Sept. U.Culm 12 feet high, erect ; sheaths 

 hispid. Panicle large and pyramidal, reflexed when old. 



21. P. longifolium Torr. : whole plant very smooth ; culm com. 

 pressed, erect, simple, slender ; leaves very long and narrow ; panicle 

 simple, elongated, racemose ; spikelets acuminate ; abortive floret 

 neutral, 2-valved. 



HAB. Pine barrens. N. J. Sept., Oct. If . Culm 2 feet high. 

 Leaves a foot or more long, very narrow. Panicle few-flowered. 



14. SETARIA. P.deBeauv. 



Has the same character as Panicum, except that the panicle 

 is spiked. Triatidria, Digynia. 



1. & viridis P. de B. : spike cylindrical ; involucre of 4 10 fascicu- 

 late bristles, scabrous upward ; spikelets geminate ; perfect floret 

 smooth ; sheaths pubescent. Panicum viride Linn. 



HAB. Sandy fields. N. S. July, Aug. . Culm 1 1-2 to 2 

 feet high, simple. Involucre longer than the flowers. 



Wild Timothy. 



2. & glauca P. de B. : spike cylindrical ; involucre of many fascicled 

 bristles, scabrous upward; perfect floret transversely rugose. Panicum 

 glaucum Linn. 



b. purpurascens Ell. : sheaths hairy ; glumes and bristles of the 

 involucre hairy. 



HAB. Road sides, &c. N. S. July, Aug. 0. Culm 2 feet 

 high. Spike 34 inches long. Introduced. Bottle Grass. 



3. S. rerticillata P. de B. : spike subverticillate ; bristles of the in- 

 volucre 2, retrosely scabrous ; spikelets solitary ; paleee of the per- 

 fect floret nearly smooth. Panicum verticillatum Linn. 



HAB. Sandy grounds. N. S. July. 0. Culm 18 inches high. 

 Spike 2 inches long. Introduced. 



4. S. italica P. de B. : spike compound, interrupted at base, nod- 

 ding ; spikelets conglomerate ; involucre many times longer than the 

 flowers ; rachis tomentose. Panicum italicum Linn. 



HAB. Ditches. N. J. to Car. July. #. Culm 4 feet high. 

 Panicle 6 8 inches long. 



34 



