100 SET ARIA VERTIGILLATA. 



strongly dentate, the teeth pointing downwards. Glumes very unequal, 

 two. Upper floret of two paleae. Styles two. Stigmas short and 

 plumose. Stamens three. Anthers deep purple in colour. Seeds 

 shining and hard. Length from six to twenty-four inches. Root 

 annual and fibrous. 



The involucral bristles are much larger in Setaria viridis. 



Flowers in July, and seeds ripen toward the close of September. 



The specimen for illustration was gathered in Batfcersea Fields, by 

 Mr. J. Sidebotham, of Manchester. 



