195 



TRITICUM REPENS. 



SMITH. HOOKER AND ARNOTT. PARNELL. SINCLAIR. 



DEAKIN. KOCH. LINDLEY. GREVILLE. BABINGTON. WILLDENOW. 



KNAPP. SCHRAUER. HOST. LEERS. SCHREBER. EHRHART. HUDSON. 



WITHERING. HULL. EELHAN. SIBTHORP. ABBOT. MARTYN. 



KUNTH. MACREIGHT. 



PLATE LXV. A. 



Triticum littorale, HOST. 



" junceum, HELIIAN. 



Agropyrum repens, BEAUVAIS. LINDLEY. 



Elymus ar&narius, HUDSON. 



The Creeping Wheat- Grass, or Couch Grass. 



Triticum Wheat. Repens Creeping. 



ONE of the most troublesome weeds that the farmer has to 

 encounter, being difficult to eradicate from the soil, having 

 long creeping roots, which branch out in every direction. 



It is common everywhere in England, Scotland, and Ireland. 

 Also a native of Iceland, Russia, Norway, Sweden, Switzer- 

 land, Italy, France, Germany, Spain, Portugal, and the United 

 States; yet not found above the altitude of six hundred feet. 



Stem upright, circular, smooth, and striated, carrying five 

 or six flat acute leaves with smooth striated sheaths; upper 

 one shorter than its leaf, and having a very brief blunt 

 ligule at its apex. Inflorescence spiked. Spike upright; spike- 

 lets oval, of four or five awnless florets, and placed alternately 

 on the zigzag rachis in rows. Calyx consisting of two equal, 

 acute glumes. Florets of two paleae, exterior one of basal 

 floret five-ribbed, harsh, and acute. Inner palea minutely 



2 I 



