66 Bulletin V. 2. 



barbed downwards so that the heads (panicles) often become 

 entangled with each other, or readily adhere to passing objects. 



Setaria viridis, Beauv. — Green Fox-tail, Pigeon-grass, Green 

 Pigeon-grass, Puss-grass, Bottle-grass, Wild Millet. 

 An introduced grass which has become a common weed in all 

 cultivated grounds, growing along with the yellow fox-tail, 

 which it resembles in habit. It begins to bloom a few weeks 

 earlier (latter part of May or first days of June) than the yellow 

 fox-tail, has more numerous and smaller flowers and green 

 bristles — at least the bristles do not give a yellowish hue to the 

 panicle. 



Sheep's Fescue. — Festuca ovina. 



Shining Spike-grass. — Uniola nitida. 



Short-leaved Beard-grass. — Gymnopogon brevifolius. 



Short-stalked Meadow-grass. — Eragj-ostis Frankii. 



Silky-flowered Oat-grass — Datithonia sericea. 



Silver Beard-grass. — Andropogon argyrceus. 



Slender Crab-grass. — Fanicum filifomie. 



Slender Fescue. — Festuca tenella. 



Slender Meadow-grass. — Eragrostis pilosa. 



Slender Spike-grass. — Ufiiola gracilis. 



Smaller Blue-grass. — Poa compressa. 



Small Cane. — Arundinaria tecta. 



Small-flowered White-grass. — Leersia Virginica. 



Small Reed-grass, Canadian. — Calamagrostis Ca?iadensis. 



Smooth Brome-grass. — Bromus racemosus. 



Smooth Meadow-grass. — Poa pratcfisis. 



Smooth Rye-grass. — Elymus Virgifiicus. 



Smooth-stalked Meadow-grass. — Poa pratensis. 



Smut-grass. — Sporobolus Indicus. 



Soft Brome-grass. — Bromus mollis. 



Soft Chess. — Bromus mollis. 



Soft-grass, Meadow. — Holcus lanatus. 



Soft-grass, Woolly. — Holcus lanatus. 



Sorghum avenaceum, Chapm. — A variety of Andropogon nutans, Linn., 

 which see. 



Sorghum cernuum, IPost. — Chicken Corn, Guinea Corn, White 

 Egyptian Corn. 

 This is treated as a variety of Andropogon sorghum by Hackel. 

 It is a tall and strong growing grass, and just below the densely- 

 flowered panicle the stalk is abruptly bent or recurved so that 



