18 ALOPECURUS GENICULATUS. 



Flowers at the beginning of June, and ripens seed in the 

 last week in August. 



The awn in A. geniculatus commences slightly above the base, 

 and extends half its length beyond the palea, and the anthers 

 are long; in A.fulvus anthers short, and awn commencing below 

 the centre, and not extending beyond the palea. 



A. geniculatus has a smooth stem, whilst in A. agrestis it is 

 rough. 



In A. alpinus panicle short, whilst in A. geniculatus it is long. 



In A. pratensis upper sheath more than twice the length of 

 its leaf, whilst in A. geniculatus only of same length as its leaf. 



This species is subject to variety. 



My thanks are due to Dr. Wilson, of Nottingham, and to 

 Mr. Joseph Sidebotham, of Manchester, for specimens. 



The illustration is from Dr. Wilson's specimen, which was 

 gathered in Cheshire. 



