172 BROMUS DIANDRT7S. 



equal acute glumes. Upper one three-ribbed, lower one destitute of 

 lateral ribs. Florets of two palese, the exterior one of basal floret bifid, 

 membranous, and extending beyond the calyx, seven-ribbed, the two 

 marginal ribs on either side approximate, central rib dentate. Length 

 from six to twelve inches. Root annual and fibrous. 



Flowers towards the end of June, and ripens its seed at the end of 

 July. 



The specimen illustrated was gathered at Bristol, by Mr. Joseph 

 Sidebotham, of Manchester. 



