HORTUS GRAMINEUS WOBUUNENSIS. 265 



Obs. — This plant differs from the Festuca glauca of Host. (t. 88.) 

 in the stem, which is round, smooth, and straight. The leaves 

 are longer and smooth ; the spikelets less spear-shaped > 

 the panicle is contracted before and after flowering: spikelets 

 5-7 flowered ; awns short and rigid. Mr. Curtis, in his enu- 

 meration of British grasses, mentions this as indigenous; and 

 and on this authority it is here entered, as I never could find 

 it in its natural state. There is a variety of this species with 

 subulate leaves, which grow in dense tufts; every part of the 

 plant is smaller than the first variety, and from a difference 

 in the shade of colour, may be called var. glaucescem. 



German, Graugruner-Sehwitigel. 



Native of Britain. Root perennial, fibrous. 



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



brown loam is — 



Produce per Acre, 

 dr. qr. 

 Grass, 14 oz. The produce per acre 

 80 dr. of grass weigh, when dry - 32 7 

 The produce of the space, ditto - 89 2f 3 

 The weight lost by the produce of one acre in drying 

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

 The produce of the space, ditto - 10 2 3 

 At the time the seed is ripe the produce is — 

 Grass, 14 oz. The produce per acre 

 80 dr. of grass weigh, when dry - 32 ^ 

 The produce of the space, ditto - 89 2f 3 



The weight lost by the produce of one acre in drying 

 64 dr. of grass afford of nutritive matter 12^ 

 The produce of the space, ditto - 5 13 



The proportional value in which the grass, at the time 

 of flowering, is superior to that at the time the seed 

 is ripe, is as 2 to 1. 



The produce of the latter-math is — 

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



64 dr. of grass afford of nutritive matter 1 2 111 10 10 



The proportional difference between the flowering and seed 

 crops of this grass is directly the reverse of that of the Poa trivi- 

 alis: and it affords one out of many proofs that might be brought 

 forward, of the value of the culms in grasses intended for hay. 

 The culms at the time of flowering are of a very succulent nature; 



