ORDER 155. GHAMINEJ2. 



397 



32. TRISETUM, L. Spkl. 2-5-flvvd. Glumes 

 <?, shorter than the fls. Lower pale with two bris- 

 iles at the apex and a soft flexuous awn from above 

 (lie middle of the back. Grain coated, furrowed. 

 IT Fls. paniculate. 



1 T. purpurascens Torr. Spkl. (p) about 4-flwd.. 



68", few (69) in the very pimple purple panicle ; fls. 

 (rf) separate, bearded at base ; gl. (g) unequal; Ivs. nar- 

 row-linear; culm erect, 2 3f. Mountain bogs, N. June. 



2 T. palustre (Mx.) Spkl. (a. b) 3-flwd. 2*", the upper fl. 



abortive ; middle fl. with a bent awn its own length ; pan. 

 narrow, 4 G' ; Ivs. very short (2 3') ; culm slender, 2f. 

 Plant smooth. Wet meadows. May July, (c, pale.) 



3 T. molle (Mx.) Spikelets 2-flwd., 3" ; upper fl. with a bent awn its own length ; K- 



lance-linear ; panicle as in No. 2; Ivs. broader and longer; plant 2f, minutelv 

 downy. Rocky hills, N. July. 



33. BROMUS, L. BROME G. Spikelets 

 5-oo -flwd. Gl. unequally veined. Lower pale 

 /5-9-veined, awned from below the mostly bifid 

 tip. Upper pale ciliate on its 2 keels, adhering to 

 the linear grain. Coarse grasses, with flat leaves, 

 and large, nodding, panicled spikelets. June, July. 



Glumes narrow, the lower 1-veined, upper 3-veined. 



Lower pale keeled. . . (6) 

 Glumes veiny, the lower 35, upper 5 1-veined. Lower 



pale convex., .(a) 



a Awn much shorter than its pale. Pan- 

 icle spreading Nos. 1, 2 



a Awn as long as its pale. Panicle erect, contracted in fruit Nos. 3, 4 



b Lower pale comprcssed-carinate, awn very short No. J 



b Lower paie rounded on the back, the awn conspicuous Nos. 6, 1 



1 B. Kiiliiiii Gr. Wild Chess. More or less hairy. H 3f ; spkl. drooping, closely 



7-12-flwd., densely silky ; lower palt .auch the larger ; pan. small, li Dry. 



2 B. secaliiius L. Cheat or Chess. (?) Nearly glabrous, Zif; spkl. ovate, turgid, 



glabrous, 7-10-flwd.. fls. (a) eoon diverging, blunt, awned or not; panicle nearly sim- 

 ple. 48' long, spikelets 810" long, drooping. (T) Fields. Eur. 



3 B. racemosus L. Erect Chess. Spkl. ovate-oblong, glabrous ; closely 8-12-flwd., 



awns straight, 4" ; pan. simple ; plant slender, some hairy, (i) Field*. Enr. 



4 B. mollts L. Downy Chess. Plant downy, with spreading hairs; spkl. o'-ate. 



about 6-flu d., fls. closely imbricated ; awns straight, 31". (I) Fields : rare. 



5 B. uiiioloides II. & K. Rescue ff. Culm erect, Ij 3f, smoothish ; pau. nar 



row, 610'. nodding; spkl. lance-oblong, compressed, !', 8-12-thvd. Cult. South. 



6 B. dllatus L. Pan. compound, 5 8', soon nodding; spkl. at first lance- fusifoi in 



(b), 7-11-flwd., the fls. soon separating; pale (c) compressed-carinate above, silky 

 haired at edge, twice longer than its straight awii; culm 2 4f; Ivs. some hairy, u 

 Shady banks : common. July, August. 

 /3. ptn-g-aiit. Plant finely and closely pubescent all over. 



7 B. aterlllg L. Pun. compound, soon 1-^ided and nodding; ped. capillary; spkl 



linear-oblong, about 5-flwd., puberulent; fls. linear-subuiate, scarcely as long as the 

 awn. (I) Banks. Pa., and N. Rare. 



8 B. BKIZOIDES. Culm If, erect ; Ivs. narrow, conduplicate, rigid ; pan. erect, with a 



few large, hanging, ovate, awned spikelets ; pale dilated, ear-shaped above. Cult 



