ORDER 155. GRAMINEJi;. 



385 



2 S. Virginieus (L.) Like No. 1, but the root is 2f , the culms brancLed, often de- 



cumbent, and the spikelets very small (1") and many. Coast, S. Sept., Oct. 



3 S. cuspidata (Torr.) Glumes very acute, the lower pale cuspidate ; pan. terminal, 



blender, few-flowered ; spikelet nearly 2". u Maine, and Canada. 



4 S. cryptandrus (Torr.) Culm 2 3f; sheaths strongly bearded at the throat; 



terminal panicle pyramidal, exserted, the lateral concealed ; pales equaling the upper 

 glume (l")i twice longer than the lower. y. Sandy coasts and shores. Aug. 



5 S. jit 11 ecus (Mx.) Glaucous, erect, 1 2f; leaves erect, 2 6' by 1" ; pan. open, 



h talked, narrow, loose ; glumes ovate, obtuse, the upper H", lower i", anth. and 

 stig. white. V Common in dry barrens, Penn., VV., and S. No lateral pan. Aug.-Oct. 



6 S. lieterolepis (Gr.) Lowest Ivs. as long as the culm, 1 2f; upper gl. 3", subu- 



late, longer, lower cuspidate, shorter than the pales ; panicle very thin, stalked, 

 open ; grain globular, 1". Dry places, Conn, to Wis. Aug. 



7 S. asper Kunth. (c) Lowest Ivs. very long (1 3f ), involute-filiform ; culms 1 2f ; 



panicle contracted, partly or wholly enclosed ; glumes unequal, white, much shorter 

 than the oblong obtuse pales (3") ; grain oval. Sands. Sept. 



8 S. Iiidicus Br. Erect, 2 3f ; pan. long (If), very narrow, its short branches ap- 



pressed ; glumes unequal ; grain oval. Dry grounds, S.: common. May Sept. 



9 S. conipressus Kunth. Culm erect, 1 2f, leafy, much compressed, branched at 



base ; pan. thin, 610' ; gl. acute, f"; pales 1", obtuse. Sandy bogs, N. J. Sept. 



10 S. serotinus (Torr.) Culm filiform, compressed, 1018', few-lvd. ; pan. capil- 

 lary, diffuse ; glumes ", ovate, obtuse ; pales i". Wet sands, Maine to N. J. Sept. 



7. CINNA, L. SWEET REED-GRASS. Spkl. 1-flwd., flat. 

 Gl. 2, subequal, awnless, the upper a little longer than 

 the subequal pales, which are short-stiped. Lower pale 

 with a short awn on the back. Sta. 1. Grain oblong, 

 free. If. Erect, tall and simple, with a large panicle* 

 green or slightly purplish. July, Aug. 



1 . peiidula Trin. (a) Culm 3 5f ; Ivs. broad-linear, with conspicuous ligules; 



pan. pale-green, If, nodding, with its drooping branches in whorls of 4's or 5's ; awn 

 exserted. A fine grass in clamp woods, much sought by cattle. 



2 C, aruiidiiiacea Willd. Bright green, 3 6f; pan. erect, green-purple, 10' ; lower 



pale obtuse, its awn not exceeding its obtuse point. Handsomer than No. 1, its 

 epikelets twice larger (,'i"). Shady woods. 



8. MUHLENBERGIA, Schr. DROP-SEED 

 GRASS. Spkl. 1-flwd. Glumes persistent, bristle- 

 pointed or acute, rarely obtuse. Pales sessile, 

 usually hairy at base, deciduous with the en- 

 closed grain, green, the lower awned or mucro- 

 nate at apex. Sta. 23. Culms often branched. 

 July Sept. 



BRACHYELYTRUM. Glumes minute, the lower 



obsolete. Panicle narrow Nos. 1, 2 



$ TRICHOCHLOA. Glumes small. Lower pale 



3-veined. Panicle capillary No?. 3, 4 



MUHLEXBERGIA. Gl. manifest. Pale 3-veined. Pan. terminal and axillary., .(a) 



a Glumes awned and twice longer than the awnless pale No. 9 



a Glumes pointed, not longer 'than the mucronate pale .Nos. 6, 7 



the long-awned pale Nos. 8, 9 



1 MT. aristata Pers. Erect, simple, 1 2f; Ivs. broad-linear: pan. terminal, simple, 



25 



