PLATE 50. 



GREEN FOXTAIL, Setaria ciriJis, Beauv. 



Other English name : Pigeon Grass. 



Other Latin names : ChcrtochJoa viridis (L) Scribn. ; Ixophoru-^ viridis 

 (Li) Xash ; Chamccraphis viridis, Porter. 



Introduced. AnnuaL Stems several, erect, simple or branched from 

 below, 1 to 2 feet high, leafy. Panicle condensed into a cylindrical com- 

 pound spike. Spikelets single-flowered, or with a perfect flower and a 

 neutral flower beside it, inside 3 empty glumes or scales, awnless, but with 

 a cluster of -3 to 6 persistent green bristles below the florets on the short 

 peduncle. The tough hard husk of the seed is about yV of an inch 

 long, oval, with the glume or outer scale rounded and folded over the highly 

 polished rounded edges of the pale or inner scale, which is flattened in Ihe 

 middle. Both scales of the husk are roughened crosswise with narrow ridges. 

 The colour is very variable, according to the degree of ripeness — yellow, gray, 

 brown or purplish, the darker seeds mottled with darker spots. The seed 

 itself is greenish white, convex on the outer germ-bearing face and flattened 

 on the inner face. [Plate 54, fig. 40 — natural size and enlarged 8 times.] 



Tinne of Flowering : June to September; seeds ripe by July. 



Propagation : By seeds. 



Occurrence : Abundant in Eastern Canada; as vet only occasional in 

 the West. 



Injury: The seeds are one of the commonest impurities in clover and 

 grass seeds. 



Remedy : A common and abundant weed in all crops on land not worked 

 under a short rotation. Easily killed when young by smothering with earth 

 in the cultivation of hoed crops. Late plants in hoed crops, after cultiva- 

 tion stops, should be pulled by hand. 



Yellow Foxt.\il, Setai-ia glnuca, Beauv. Another grass of the same 

 family and very similar to the above is the Yellow Foxtail. The branches, 

 however, are more decumbent and spreading, the whole plant rather larger 

 and more succulent, the spikes less compound and slenderer, with larger 

 seeds J inch, and the bristles are distinctly yellow. The seeds are almost 

 equally common with those of the Green Foxtail in commercial seeds. 



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