HORTUS GUAMINEUS 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, l^ut 

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

 fifteen years the native plants ha,ve 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 re- 

 markable one as connected with the long-continued effects of 

 difi^erent climates on the same species of plant. In the hothouse 

 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. lbs. 



Grass, 46 oz. The produce per acre - - 31308 12 



80 dr. of grass weigh, when dry - 36 ^ 14088 T^ 

 The produce of the space, ditto - 331 0| 5 



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



64 dr. of grass afford of nutritive matter 2 7 q„^. p ^ 

 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 



80 dr. of grass weigh, when dry 



The produce of the space, ditto 



The weight lost by one acre in drying 



64 dr. of grass aff'ord of nutritive matter 



The produce of the space, ditto 



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. 



