HORTUS GRAMINEUS WOBURNENSIS. 291 



which grew nearly flat on the ground, and were of a reddish brown 

 colour, instead of the slight glaucous green tint of the native 

 English plant. The foreign plants flower freely every season, 

 but the native ones of this species of grass very seldom, for 

 during fifteen years the native plants have twice, only, produced 

 flowers. In the hothouse, the Indian plants proved of a habit 

 exactly the same as the native plants in the open ground, having 

 the leaves equally as long as those of the latter, of their glaucous 

 colour, and not producing any flowering culms. This last fact is a 

 very remarkable one as connected with the long continued effects 

 of different climates on the same species of plant. In the hot- 

 house more soluble or nutritive matter, and also more vegetable or 

 woody fibre, were afforded by this grass than was afforded by the 

 plants of it cultivated out of doors in the Grass Garden. 



Experiments. At the time of flowering, the produce of the 

 native plant from a sandy loam, with manure, is 



Produce per Acre. 

 dr. qr. Ibs. 



Grass, 46 oz. The produce per acre - - 3130812 



80 dr. of grass weigh, when dry 36 > 14088 15 



The produce of the space, ditto - 331 OfJ 



The weight lost by the produce of one acre in drying 17219 13 



64 dr. of grass afford of nutritive matter 207 



The produce of the space, ditto 23 3 



The doob-grass, or plants raised from Indian seed 

 at the time of flowering, from a sandy loam in the 

 Grass Garden, afforded 



Grass, 4 oz. The produce per acre 2722 8 



80 dr. of grass weigh, when dry - 38 ^ q 



The produce of the space, ditto - 30 Iff J 

 The weight lost by one acre in drying - - 1429 5 



64 dr. of grass afford of nutritive matter 21 l ,, 



The produce of the space, ditto 215 



The grass, cultivated in an artificial tropical climate in the hot- 

 house, contained a superior quantity of nutritive matter to that 

 cultivated in the open air in the Grass Garden, in the proportion 

 nearly of 39 to 31 ; and the woody fibre afforded by the grass of 

 the plants cultivated in the hothouse exceeded the woody fibre 

 contained in the grass of the plants cultivated in the open air in 

 the proportion of 4 to 3. 



