TWENTY-FIRST ANNUAL MEETING. 



87 



AN ARTIFICIAL KEY TO THE KANSAS GRASSES. 



BY W. A. KELLERMAN, PH. D., 

 State -Agricultural College. 



[Descriptions of the species are given under corresponding numbers in "The Native Grasses of 

 Kansas," published in the Report of the State Board of Agriculture for the Quarter ending March 31, 

 1889.] 



Spikelets sessile on opposite sides of a jointed, or channeled rachis, forming a simple spike (1). 



Spikelets not as above (5). 

 1. Spikelets single at each joint of the rachis (2). 



1. Spikelets 2 or more at each joint of the rachis (3). 



2. Spikelets one-flowered, partly immersed in the triangular rachis SO SCHEDOKXABDUS, 



2. Spikelets many-flowered, placed edgewise on the rachis 52 LOLIUM. 



2. Spikelets several-flowered, placed flatwise on the rachis 53 AGROPYRUM. 



3. Outer glumes anterior, forming a sort of involucre (4). 



3. Outer glumes none or 1-2 awn-like rudiments ."><> ASPBBIXA. 



4. All the spikelets perfect and similar .">."> Elymus. 



4. Central spikelet of each cluster perfect and sessile, the two lateral short- 



stalked and sterile .11 BORBRUM. 



5. Spikelets in a coriaceous, spiny involucre, or bur 7 CEHCHRUS. 



5. Spikelets capitate; small grasses, creeping or stoloniferous (6). 



5. Spikelets not as above (7). 



