430 Gil A MINE. E. 



43. SETARIA, Beaur. Bliistle-gra 



Lat. weta, a bristle; in allusion to the bristly spikelets. 



Spikelets 2 -flowered, invested with an involucre of 2 or 

 more bristles. Glumes 2, unequal, herbaceous. Lowf.r 

 SLOWER abortive; tale.e 1 or 2, herbaceous. Upper 

 flower perfect-; paleje cartilaginous. — Annuity with lin- 

 ear or lancevlate JJat leaves, and the inflorescence in a dense spiked 

 panicle or apparently a cylindrical spite. 



1. S. VLRTiCILLATA. Beauv. Rough Br! 



Fpfle suhverticiilate. cylindrical, somewhat interrupted; brisllt^^hort; palea of 

 the p rrfect flower rongnisl -; anetal •. 



lanceolate, liouminate. ruu^h on the margin. Spike 2 to 3 inches long, _ 



2. S. GLAUCA, Beauv. Botfle-grass. 



very dense : bristles 6 to 11 in a cluster, much longer than the 

 spike! • d. 



Very common in stubble. July. Au;r. Culm 2 I 

 hairy "at base. SpiLc 2 to 1 inches long, tawny or or Introduced. 



3. S. viridis, Beauv. Green 



■ nearly cylindrical, more or les? con-.. in a cluster, longer 



than the =vlki.!et>: j i :. wise- and d 



Gul:. m >n. July. Aug. Culm 1 to 3 feet high, erect. Z 



linear, fiat, roughish. Spilce 2 to 3 inches Ic 



4. S. Italica, Kunth. Italian Bristle-grass. 



be compound, i at the base, thick, nodi: 2 or 3 in a 



clu-ttr. • or shorter than fch - 



Wei rly natoralised I nuder the name of 



iss, C'u.iii I - 

 purp.i :L\ 



44. TRIPSACUM, Linn. Sesame-grass. 



Gr. trilo. to rub j iluskm to the polished fertile s] 



Monoecious. Sterile spikelets above, in pairs on each 

 joint of the rachis, collateral, 2-flowcred : flowers each 

 with 2 palea?. Fertile spikelets solitary, as loug as the 

 pint, 2-flowered; the flowers with 2 palea?; the outer or 

 lower flower neutral, the inner or upper one fertile. Styles 

 united : stigmas very loug. hairy, purple. Grain ovoid, 

 free. — Gidms, stout and tall. Is I and flat. Spikes 



axillary and lerminal, seperating into joints at maturity. 



T. dactyloides, L. Sesame- Grass. Gama- Grass. 



Spilses 2 or 3 to.eth r at the summit, an 1 solitary from the upper sheaths. 



Meadows. Ju.y. Aug. Per. (him srecf or <>b i.jue. 4 to 6 feet high. Leaves 

 Jarge, often 3 feet long, lineardanceoiale, sQKOlh beneath, rough above. 4pfcN 

 4. to 3 inches long. 



