30. 



of this species are conspicuously cross striated and are easily dis- 

 tinguished from the next species because of its larger size and by 

 it cross striation. This species also comes up in grain fields after 

 harvest, hence seeding the soil abundantly. 



GREEN FOXTAIL (Sctario, mridis (L) Beauv.) 

 An erect annual from one to three feet high, leaves four to 

 twelve inches long with rough margins, greenish, more or less 

 compound cylindrical spikes from one to five inches long or even 

 in some cases six. Bristles few, much longer than the spikelets. 

 Spikelets one-twelfth of an inch long, the chaff (second and third 

 glumes) as long as the minute chaff (fourth glume), the latter 

 being dotted and striate. A single head produces an enormous 

 number of seeds. "When fields are sown to oats this plant comes 

 up in the fall and late summer Deeding the soil. 



Quack grass with a head somewhat more enlarged. (U. S. Dept. Agr.) 



QUACK GRASS (Agropyron repens (L.) Beauv.) 

 A perennial with widely spreading but shallow rootstocks which 



