48 



sequently well suited to our pastures, in which it should be fed close ; for if allowed 

 to grow up to seed the cattle refuse it ; and this seems to show that it is not so 

 much relished by stock as some of the other pasture grasses. 



Polypogon, Desf. 



Spikelets one-flowered in a contracted, mostly spike-like panicle ; 

 pedicels of the spikelets rather clavate and usually articulated below 

 the glumes ; outer glumes nearly equal and long awned from the 

 apex; flowering glume smaller, thinner, generally hyaline, and gen- 

 erally prolonged at the apex into a slender awn ; palet thin, some- 

 times considerably shorter than its glume. 



1. P. elongatus, LT. B. K. Southern California. 



2. P. littoralis, Sm. Introduced. Texas to California. 



3. f. Monspeliensis, Desf. Introduced. Atlantic coast to the Pa- 



cific. 



Arctagrostis, Gris. 



Spikelets one-flowered, in a contracted panicle ; rarely with a 

 minute bristle-like rudiment ; outer glumes persistent, thin, the 

 upper rather longer and three-nerved, the lower one-nerved ; flow- 

 ering glume as long as the outer one, or longer, narrow, lateral 

 nerves obscure, awnless ; palet about as long as its glume, two-nerved, 

 obtuse, or obtusely two-toothed. A pedicel or rudimentary flower 

 sometimes present. 

 1. A. latifolia, Gris. Arctic coast and Hudson's Bay. 



A. latifolia, var. Alaskensis, Vasey. (? A. latifolia, var. B., Gris., 

 not Vilfa arundinacea, Trin.) Alaska. 



Cinna, Linn. 



Spikelets one-flowered, much flattened, in an open, spreading pan- 

 icle ; outer glumes lanceolate, acute, strongly keeled, hispid on the 

 keel, the upper somewhat longer than the lower ; flowering glume 

 manifestly stalked above the outer glumes, about the same length, 

 three-nerved, short-awned on the back near the apex ; palet nearly 

 as long as its glume, only one-nerved (probably by the consolidation 

 of two, Bentham ;) stamen 1. A sterile pedicel sometimes present. 

 1. C arundinacea, Linn. Common northward. Wood Keed-grass- 



A perennial grass, with erect, simple culms from 3 to 6 feet high, with 

 a creeping rhizoma ; growing in swamps and moist, shaded woods 

 in northern or mountainous districts. The leaves are broadly 



