172 BROMUS DIANDRUS. 
Spikelets commencing direct from the rachis, on short footstalks, 
the basal ones mostly in twos or threes; generally of eight 
awned florets, brownish purple in colour. Calyx of two un- 
equal acute glumes. Upper one three-ribbed, lower one 
destitute of lateral ribs. Florets of two palee, the exterior one 
of basal floret bifid, membranous, and extending beyond the 
calyx, seven-ribbed, the two marginal ribs on either side ap- 
proximate, 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. 
