Key to the Grasses 



PACE 



Panicle j'-S' long, branches slender; spikelets few, narrow; flower- 

 ing scale bearing 3 spreading awns. 



Sea-beach Aristida . . . 105 

 Panicle 3'- 10' long; spikelets flat; scales 2. Leaves very rough. 



Grasses of wet grounds. White-grass .... 90 



Rice Cut-grass ... 90 

 Panicle 5'-! 5' long, many-flowered; scales 3; stamen i. Tall, leafy 

 grasses of woods and swamps. 



Wood Reed-grass . . . . 131 

 Slender Wood Reed-grass . . 131 

 Panicle pyramidal; scales 4, lowest scale small; flowering scale white, 



porcelain-like, shining. Several species of Panic-grasses ... 61 

 Panicle 2'- 10' long, pyramidal, open; spikelets small, about i" long. 

 Palet one third as long as flowering scale. 



Red-top 120 



Palet minute or wanting. Brown Bent-grass . . . 116 



Thin-grass 116 



Panicle 3'- 10' long, pyramidal, open; spikelets small. 

 Panicle many-flowered, base enclosed in upper sheath. 



Sand Dropseed . . . 115 

 Panicle very delicate. Gauze-grass . . . . 115 



Panicle 6'-24' long, pyramidal; branches hair-like, long and widely 



spreading; spikelets small. Rough Hair-grass ... 120 



Panicle 6'-i8' long; branches hair-like, widely spreading; spikelets 

 small on hair-like pedicels; flowering scale bearing a straight, 

 terminal awn 3"-9" long. Long-awned Hair-grass . . . 108 



Division B. Spikelets more than i -flowered. 

 Panicle 2'-8' long, narrow, yellowish; spikelets 2-flowered; scales 4; 

 flowering scale of upper flower bearing a bent and twisted awn. 



Marsh Oats ... 135 

 Panicle 4'-io' long, narrow; spikelets 2-flowered; scales 4; lower 

 flower staminate, its scale bearing a dorsal awn, upper flower 

 perfect and awnless. Meadow Oat-grass ... 143 



Panicle i'-6' long, narrow; spikelets 6-1 2-flowered; flowering scales 



short-awned. Slender Fescue . . .221 



Panicle 2'-8' long, contracted; spikelets 2-3-flowcred; ist scale nar- 

 row, acute, 2nd scale much broader, obtuse. Grasses of early 

 summer. Early Bunch-grass .... 135 



Meadow Sphenopholis . . . 136 

 Slender Sphenopholis .... 135 

 Panicle 2'-i2' long; spikelets 3-io-flowered, 22"-6" long. Panicle 

 narrow and contracted after flowering. 



Meadow Fescue . . . 222 

 Panicle slender, nodding, branches few. 



Nodding Fescue . . . 218 

 Panicle erect, short, branches spreading. 



Red Fescue . . . .221 



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