223 5 4 



HORTUS GRAMINEUS WOBURNENSIS. 193 



Experiments. — At the time of flowering, the produce from a 

 brown loam is — 



Produce per Acre, 

 dr, qr. lbs. 



Grass, 10 oz. The produce per acre - - 6806 4 



80 dr. of grass weigh, when dry - 34 7 



The produce of the space, ditto - 68 3 



The weight lost by the produce of one acre in drying 3913 10 



64 dr. of grass afford of nutritive matter 2 1 ^ 



The produce of the space, ditto - 5 21 S 



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



Grass, 7 oz. The produce per acre - - 4764 6 



80 dr. of grass weigh, when dry - 40 7 



. 9*^89 3 



The produce of the space, ditto - 56 5 



The weight lost by the produce of one acre in drying 2382 3 



64 dr. of grass afford of nutritive matter 3 0^ 



The produce of the space, ditto - 5 1 3 



The weight of nutritive matter in which the pro--\ 



duce of one acre, at the time of flowerino- ex- > 18 6 5 



ceeds that at the time the seed is ripe, is - J 



The weight of grass at the time the seed is ripe is less than that 

 at the time of flowering ; which at first sight appears contrary to 

 what might have been expected, as the grass had at least three 

 weeks of growth more than that of the flowering crop. But after 

 the time of flowering, the leaves do not appear to increase, but 

 rather diminish, many of them becoming completely dry before 

 the seed be perfected. The culms retain their succulency, and 

 become heavier till the seed be ripe : which points out the true 

 cause of the superior quantity of nutritive matter contained in the 

 grass of the seed crop. 



Sir James Edward Smith informs us, that it is an alpine plant, 

 ■and only as yet found a native of Scotland, where it was found 

 by ITr. Mackay, on Ben Lawers. It appears, however, to be 

 easily cultivated on soils of an intermediate quality as to moisture 

 and dryn:;ss. Its seed is good, and produced in plenty. 



The abo<e details prove this grass to be capable of cultivation; 

 but possessed of no excellence in a sufficient degree to render 

 it worthy of a place in the composition of good pasture on soils 

 of the best quality. 



It flowers in the third week of June, and the seed is ripe about 



o 



