TRIANDRIA.— DIGYNIA. 51 



0. jiUformis : panicles very slender ; corolla nearly 



equalling the calyx. 

 HAB. Swamps and wet places. Sept. 

 >. A. sobolifera ; culm erect, branched ; panicle con- 

 tracted, filiform, simple ; branches npprossed , co- 

 rolla longer than the equal calyx, hairy at the base ; 

 valves equal, awnless, mucronute at the tip. 

 HAB. Rocky hills and woods. Aug. — Sept. 4. . Culm 

 sobolif, sometimes deai'ib., 2 ft. high; nodes not 

 swelling. 

 •i. A. tenuijlora: culm nearly simple, pubescent about 

 the joints; branches (if any) appressed ; stipules 

 obsolete ; panicle contracted, filiform : corolla 

 longer than the calyx ; inferior valve with an awn 

 twice as long as the flower. 

 HAB. Rocky woods. July — Aug. y. . RoA creeping ; 

 culm 3 ft. high ; sheaths mostly pubescent. 

 ',. A. sylvatica : culm erect, much branched, diffuse, 

 smooth ; stipules lacerate ; panicle filiform ; corolla 

 longer than the calyx ; awns three times as long as 

 the flower. 

 HAB. Rocky situations. Aug. 4- Root creeping; 

 culm 2 — 3ft. high ; sheaths open and smooth. 

 '. A. compresso : whole plant very smooth ; culm erect, 

 compressed, simple ; panicle oblong, subcontracted j 

 with capillary branches ; calyx equal, shorter than 

 the corolla, acute ; corolla rather obtuse, smooth at 

 the b 

 HAB. Sandy swamps. Sept. U . Root creeping ; culm 

 sobolif. ; leav. linear, long, compress. ; sheaths cari- 

 nate ; pan. pur p. 

 '. A. terotina: culm filiform, ranch compressed ; leaves 

 very narrow erect; panicle attenuate; 



\ unequal, hall is the awnless corolla. 



HAB. Sandy Bwamps. Sept. If. 12 — 18 in high; 

 leav. almost ft I if ; part, glem 

 JO. A. juncea: leaves straight and erect, convolutelji 

 taceous; panicle oblong pyramidal, vert icilla 

 flowers awnless ; calyx half the length of the co- 

 rolla. 

 HAB. Barren sandy places. Ort.y.. Culm 1 — 2 ft 

 high t terete ; Jl. purp. : cal. unequal; nect. oho- 

 ate. 



