KEY. 213 



awn, the upper 2-pointed. An awn-like rudiment lodged in 

 a groove on its back. Brachyelytrmn aristatum, Beauv. 



{Muhlenhergia aristata, Pers.) 

 Gr. 11. 11. 



Glumes various, sometimes pretty large, the lower 

 smaller, or sometimes both small or minute, the lower always 

 shorter. Flower usually hairy-bearded at the base, the 

 lower pale 3-nerved. Rudiment none. 



(579) Muhlenbergia (592). 



Gr. II. 10. 



W. I. 7. 



588. (581.) Flowers all alike 589 



Flowers of 2 sorts ; one sort under ground. The 



terminal flowers in a strict, slender, contracted panicle, the 

 radical ones solitary on a slender peduncle. 



Amphicarpum Furshii, Kunth. 



Gr. yn. 57. 



W. II. 17. 



589. Two hairy scales at the base of the flower, one on 

 each side. Stigmas protruded at the apex of the flower. 

 Panicle branched, clustered, at length somewhat spreading. 



Phalaris arundinacea, L. 

 Gr. VII. 55. 

 W. II. 22. 



No scales at the base of the flower. Stigmas 

 emerging from the side 590 



590. Glumes ventricose, nearly as long as, or scarcely 

 longer, than the shining and at length cartilaginous pales (in 

 theory, the lower glume is wanting, and its place occupied 

 by a pale !). Grain coated by the cartilaginous pales. 

 Panicle spreading. Milium efiusum, L. 



Gr. VII. 56. 



W. II. 16. 



Glumes convex-compressed and frequently (at 

 least one of them) longer than the pales, sometimes shorter 

 than they 591 



591. Lower pale obtuse, upper one small, often minute, 

 or wanting. (585) Agrostis. 



Lower pale acute 592 



