dr. qr. 



02. 



lbs. 



At the time the seed is ripe, the produce is, 



- 32 



f ^ 



Grass, 8 oz. The produce per acre 



.80 dr. of grass weigh, when dry 



The produce of the space, ditto 



The weight lost by the produce of one acre in drying 



64 dr. of grass afford of nutritive matter 



The produce of the space, ditto ^ ^ 



The produce of latter-math, is, 

 Grass, 6oz. the produce per acre 

 64 dr. of grass afford of nutritive matter 



87120 



20 



217B0 



5445 

 1361 4 



4083 12 



2 

 4 



2722 8 



170 2 8 



2 per acre, is 



65340 

 2041 14 



4084 12 



127 9 U 



This grass is common in meadows where tlie soil is peaty; it generally inhabits the drier 

 parts. It is eaten by horses, oxen, and sheep, indifferently with other grasses ; hares, however, 

 prefer the Poa pratensis to this : for five successive years they cropped a patch of the Poapra^ 

 tensis, and left untouched a similar space of this grass that grew close by it. The proportion of 

 saccharine matter was greater, in the nutritive matter of the Poa pratcnsis, compared to that of 

 the other constituents, mucilage, and bitter extractive, than in tl^e nutritive matter of tills spe- 

 cies of poa, which contained more bitter extractive. This seems to confirm, with respect to the 

 liking of the hare, what Sir Plumphry Davy has proved with respect to the grasses most liked 

 by cattle, " that they have either a saline or subacid taste." 



The produce of the seed crop, and that of the latter-math, consists of leaves ; in the flpwer- 

 ing crop there are many decaying root leaves, and in the seed crop the leaves are more succu- 

 lent, but the culms are perfectly dry : this accounts for the equal quantities of nutritive matter 

 afforded by equal weights of the grass at both these stages of growth. 



What was before said of the demerits of the Poa pratensis, likewise applies to this grass; 

 and from the above facts, it is evidently one of the inferior pasture grasses, and cannot be re- 

 commended for cultivation with any prospect of advantage. Flowers in the beginning of June, 

 and ripens the seed in the beginning of July, 



" + 



Poa trimalis, Rougli-stalked Meadow-grass. 



■ ■ 



Specific character: Panicle rather spreading; spikets 3-ilowerecl, pubescent at the base; 



culm somewhat ascending, rough ; sheath scale tapering to a point. 

 Obs. The great roughness of the culms and leayes, manifested, when drawn between the 



fingers ; the sharp-pointed sheath scale, and the fibrous root, so conspicuous in this spe- 



cies, sufficiently distinguish it from the Poa pratensis. 



Experiments. 



With 



V 



Grass, 11 oz. The produce per acre 

 80 dr. of grass weigh, when dry 

 •The produce of the space, ditto 

 The weight lost by the produce of one acre in drying 



qr. 



oz. 



lbs. 



- 24 



54 0^ 



119790 



^69^ 



7486 14 

 2246 1 

 5240 13 



