102 8ETARIA VIHIDIS. 



deep purple. Seeds smooth and hard. The involucral bristles in 

 Setaria verticillata have the teeth pointing downwards. Length from 

 three to eighteen inches. Root fibrous, annual. 



Flowers in July, and seeds ripen at the end of September. 



The specimen for illustration was gathered in Battersea Fields by 

 Mr. Joseph Sidebotham, of Manchester. 



SETARIA GLAUCA. BEAUVOIS. 



A THIRD species, Setaria glauca, has been discovered by Mr. Borrer, 

 at Weybridge, in Surrey, and also at Hoddesdon, Hertfordshire, yet 

 it has been considered a spurious British Grass. It has the dentations 

 of the involucre erect, as in S. viridis, but differs from that species in 

 having two glumellas, and in being wavy. 



