CIILOHIDE.E. 399 



late on the keel, first recurved, linear, mucronate, 3-3.5 mm. long, 

 second linear-lanceolate with 2 nerves on one side of the keel, 6-9 

 mm. long; floral glume nearly smooth on the 1-nerved keel, emar- 

 ginate 5-5.5 mm. long; palea oval, 0.5-0.7 mm. longer than its 

 glume. 



Very variable and often much like S. gracilis. The glumes 

 arc not so hispid on the keels; there is a greater difference between 

 the length of the first and second glumes, and the palea when de- 

 tached is still longer than its glume; culms more slender, and 

 blades smaller and harder. 



Vermont, Pr ingle; Massachusetts, Stiirtevant, Bcal 87; New 

 Jersey, Brinton for U. S. Dept. Agricul. 126; Delaware, Canbij 

 for Clark 1913; North Carolina, McCarthy; Mississippi, Tracy. 



Abundant on the sidt marshes of the Atlantic coast, where it is 

 cut and cured as "salt hay." 



U. S. Dept. Agricul. 126 from Brinton in 1881. 



4. S. gracilis Trin. Mem. Acad. St. Pctersb. (6) 5 (1840). S. 

 junciformis Kngelm. tS- Gray, Bost. Journ. Nat. Ilirft. 5: 238 (1845). 



Culms 30-flO cm. high. Leaf-blades rough above, very smooth 

 below, 6-30 cm. long. Spikes 4-10 in number, nearly sessile, 2-5 

 cm. long, appressod, slightly imbricate. Spikelets elliptical or lin- 

 ear-oblong, 6.5-9 mm. long; empty glumes ciliate-hispid on the keel, 

 first linear, acuminate. 3.5-4 mm. long, second linear-lanceolate with 

 2 nerves on one side of the keel, 6-9 mm. long; floral glume oval, 

 1-nerved, obtuse, 5-8 mm. long, ciliate on the upper part of the 

 keel ; palea oval, emarginate, and when removed just as long as its 

 glume. 



Very variable; compare with S. juncea. 



Mississippi, Tracy; Utah, Jones 1089; Colorado, Cassidy; Ore- 

 gon. Ho well. 



Dakota to Oregon, south to Texas and Arizona. 



5. S. stricta (Ait.) Rotli, Xeue Beytr. 1:101. Dactylis stricta 

 Ait. Ilort. Kew. 1 : 104 (1789). Salt Marsh-grass. 



Rootstocks long-branched, extensively creeping. Culms erect, 

 strict, smooth, leafy to the top, 30-60 cm. high. Sheaths longer 

 than the internodes; ligule short, silky; blades firm, soon convo- 



