406 



ORDEU 156. GRAM1NKJ5. 



2 I*, temiil^iitiim L. Poisonous V. Smooth, 2f, simple; Ivs. rough-edged; spRL 

 5-7-flwd., remote on the scabrous rachis, shorter or not longer than their glume; fla. 

 twice shorter than the'.r awn. (I) Fields. Pa., and N. Grain poison, (b, c) 

 /S. Canarttnite (Mx.) Fls. awnless 1 or some of them short-awned; glume 1'lonaf, 

 much exceeding the flowers. Wayne Co., N. Y. E. L. Hankenson. 



56. TRITICUM, L. WHEAT. Spikelets sessile in 2 

 rows on the teeth of the rachis, and sidewise to it, its upper 

 fls. abortive. Gl. 2, equal, opposite, mucronate. Pales 2, the 

 lower awned or mucronate. Spike simple, rarely branched. 



ASROPYRUM. Glumes lanceolate, acute or awn-pointed .Nos. 1.2 

 TRITICUM. Glumes ovate-oval, obtuse or truncate.. . .Xos. 3, 4 



1 T. repens L. Couch G. Quick G. (a) Culms trailing at base, 



then erect, 1 2f, from long creeping rhizomes (Fig. 257. p. 78) ; 

 spike (a) erect, 35' ; spikelet remote, lance-oblong. 5-7-flowored ; 

 awns short or 0. V A vile weed, in gardens, etc. June. July. (b, a flower.) 

 /S. <(ani/iacliiinni. Glaucous ; spikelets hoary-pubercent. Lake shores, N-W. 



2 T. vlolAcenm Hornm. Erect, 2 3f; root fibrous; spike slender, dense, 2 4'; 



spkl. closely imbricated, 3-5-flwd. ; awns 13" long, straight. Mts., Pa. (Porter), <te N. 



3 T. can in urn L. Dog's Couch G. Ascending, 2 3f: rt. fibrous; sp. dense; spkl. 



5-7-flwd. ; awns (6") twice longer than the pale, some recurved. 2J Fields, Del. to Wis. 



4 T. VTJLGAHE. Common Wheat. Culm firm, 3 5f; leaves broad-linear ; spike some- 



what 4-sided ; spkl. crowded, broad, 4-flwd. ; gl. blunt, round-convex ; flowers often 

 awned ; grain free. (T) @ Varies as Summer Wheat, with awns, and sown in spring; 

 and Winter Wheat, without awns, sown in autumn. 



57. SECALE, L. RYE. Spikelets single on the teeth of the rachis 

 ^-3-flwd., the 2 lower fls. fertile, sessile opposite, the upper one abortive. 

 Gl. 2, opposite, subulate. Pales 2, herbaceous, the lower awned. 



S. CEREALE. Culm firm, 4 6f high ; Ivs. glaucous ; spike linear, flattened, 36', nod- 

 ding ; lower pale and its long straight awn ciliate-scabrous. Said to be native 

 in the steppes of Caucasus. Cultivated from earliest times. 



68. LEPTOCHLOA, Beauv. Spkl. 3- OO-flwd., subsessile, in one- 

 sided, slender spikes. Gl. 2, keeled, awnless. Pales membranous, awn- 

 less or awned, the lower keeled, 3-veined. Lvs. flat and soft. Pan. com- 

 posed of many long, slender spikes. Aug., Sept. 



Spikelets 2-4-flowered. Lower pale simply 



acute Nos. 1, 2 



Spikelets 6-10-flowered. Lower pale mu- 

 cronate and notched Nos. 3, 4 



1 L. mucronata K. Culm ascending, 2 3f ; leaves 



hroad-linear ; pan. If or more ; spikes filiform. 3 4', 

 floriferous from base ; spikelet of fls. minute, shorter 

 than the mucronate glumes. (T) Fields, Va. to 111., & S. 



2 IA, filiformls R. & S. (b) Tall, stout; pan. 1 2f; 



spikes filiform, straight, suberect, 58', very many ; 

 pk . of fls. (cl) exceeding the acute glumes, (g? S-W. 



3 L.. lasficiilarls (Lam.) (a) Tall, stout; pan. ob- 



long, dense, 915' ; spikes 23' ; spkl. (c) lance-oblong, 23", shortrpedicelled ; lowei 

 pale strongly 3-veined, the veins excnrrent into 2 teeth and a cusp between. 

 Marshes. N. Y S and W. 



