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Agrostis canina. 
A grass usually of low size, 6 to 12 inches high, with slender culms, 
and a light, flexible, expanded panicle, and with a perpiexing variety 
of forms. There are several varieties growing in mountainous regions 
throughout the United States, and in Europe. It forms a close sod, 
and affords considerable pasturage in those regions. Itis probably one 
of the grasses called Rhode Island bent grass. 2 
Agrostis exarata. ~ 
This is chiefly a northwestern species, being found in Wisconsin and westward to 
the Rocky Mountains, also from British America and California to Alaska. It is 
very variable in appearance, and presents several varieties. It is generally more 
slender in growth than the common redtop. The panicle is usually longer, narrower, 
and looser. In all the formsthe palet is wanting oris very minute. The form chiefly 
growing on the Pacific slope from California to Alaska is often more robust than the 
Agrostis vulgaris, growing 2 to 3 feet high, with astout, firm culm, clothed with three 
or four broadish leaves, 4 to 6 inches long. The panicle is 4 to6 inches long, pale 
green, rather loosegbut with erect branches. 
It deserves trial for cultivation, at least on the Pacific side of the eon- 
tinent. (Plate 49.) 
CINNA. 
Spikelets one-flowered, much flattened, in an open, spreading panicle; outer glumes 
lanceolate, acute, strongly keeled, hispid on the keel, the upper somewhat longer 
than the lower; fiowering glume manifestly stalked above the outer glumes, about 
the same length as the outer ones, three-nerved, short-awned on the back near the 
apex; palet nearly as long as its glume, only one-nerved (probably by the consolida- 
tion of two, Bentham); stamen one. A sterile pedicel sometimes present. 
Cinna arundinacea (Wood Reed Grass). 
A perennial grass, with erect simple culms from 3 to 6 feet high, and a creeping 
rhizoma; growing in swamps and moist, shaded woods in northern or mountainous 
districts. The leaves are broadly linear lanceolate, about 1 foot long, 4 to 6 lines 
wide, and with a conspicuous elongated ligule. The panicle is from 6 to 12 inches 
long, rather loose and open in the flower, afterwards more close. 
This leafy-stemmed grass furnishes a large quantity of fodder, but 
experiments are wanting to determine its availability under cultivation. 
(Plate 50.) 
Cinna pendula. 
This species is more slender, with a looser drooping panicle and more 
capillary branches, and with thinner glumes. It occurs in the same 
situations as the preceding, and is more common in the Rocky Mount- 
ains and Oregon. 
AMMOPHILA. 
Spikelets one-flowered, in a contracted, spike-like or open, diffuse panicle, with or 
without a bristle-like rudiment opposite the palet; outer glumes large, nearly equal, 
rigid, thick, lanceolate, acute, keeled, five-nerved; flowering glume similarin texture, 
_ abont equal in length, sometimes mucronate at the apex; palet as long as its glume, 
of similar texture, two-keeled, suleate between the keels; hairs at the base of the 
flower usually scanty and short, 
