1/0 MONOCOTYLEDONS. GRAMINE^E. 



leaves linear-lanceolate, root creeping, p. 40. Moist pas- 

 tures. 



23. TRITICUM. 



Glumes 2-valved, many-flowered ; valves opposite, solitary, near- 

 ly equal. Perianth 2-valved ; valves lanceolate ; ext. one acu- 

 minated or lengthened into an awn. Caryopsis adnate with 

 the perianth. Racliis zigzag, toothed. (Flowers spiked.) 



1. Tr.junceumy valves of the glume obtuse much ribbed with 

 4 5 awnless flowers, leaves involute pungent, root creeping. 

 p. 44. Sea-coast. 



2. Tr. repens, valves of the glume much nerved with from 4 8 

 awned (rarely awnless) flowers, leaves plane, root creeping. 

 p. 44. Waste places. 



3. Tr. caninum, valves of the glume awned (mostly 3-) nerved 

 with about 5 awned flowers, leaves plane, root fibrous, p. 44. 

 Woods and banks. 



4. Tr. cristat2tm, valves of the glume subulate keeled aristate 

 scarcely nerved of about 4 awned flowers, spikelets much 

 crowded, p. 45. Sea-side, very rare. 



5. Tr. loliaceum, spike secund, valves of the glume indistinctly 

 3 -nerved obtuse of many awnless flowers, root fibrous an- 

 nual, p. 45. Sea-coast. 



24. BROMUS. 



Glume of 2 valves, many- flowered. Perianth bivalved ; valves 

 lanceolate ; ext. one awned below the extremity. Caryopsis 

 adnate with the perianth. (Inner valve fringed. Sm.) 

 * Awn terminal. Raceme spiked. 



1. Br. sylvalicuS) raceme spiked slightly drooping, spikelets di- 

 stichous linear erect remote, awns straight longer than the flo- 

 rets, p. 40. Woods. 



** Awns from below the point of the perianth. Panicle branched. 



2. Br. secalinuSy panicle spreading, peduncles but little branch- 

 ed, spikelets oblongo-ovate (ovate, Sm.) compressed of about 

 10 subcylindrical glabrous rather remote flowers longer than 

 the awn." p. 41. Fields. 



3. Br. velutinuSy panicle spreading, peduncles but little branch- 

 ed, spikelets oblongo -lanceolate compressed of about 12 cy- 

 lindrical pubescent subimbricated florets, awns longer than the 

 glume (at length patent), p. 41. Fields. 



4. Br. mollis, panicle erect close compound, spikelets ovate sub- 

 compressed, florets imbricated depressed pubescent, awn 

 straight about as long as the glume, leaves very soft pubescent. 

 p. 41 . Pastures. 



5. Br. racemosuS) panicle erect, peduncles simple, spikelets ovate 



