300 IIORTUS GRAMINEUS WOBURNENSIS. 



feet of soil was submitted to experiment at the time of flowering, 

 and the seed produced on the same space of ground was the 

 quantity made use of in the same experiments, and which gave 

 the above proportion. Most of the perennial grasses have very 

 small seed, and the culms in general are succulent at the time the 

 seed is perfected, which is not the case with the annual species. 

 If the seeds, however, of the perennial grasses are suffered to 

 remain a little while after they are ripe, the culms very soon 

 become dry. The different degrees of this property in grasses 

 may be ascertained, in some measure, by a comparison of the 

 quantities of nutritive matter which they severally afford at the 

 time the seed is ripe, as already stated in the foregoing details. 



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

 the end of July. 



jiGROSTIS canina capillaris. Fine-panicled Brown Bent. 



Variety with a hair-like panicle, spreading, flexuose, calyces 

 subulate, equal, smooth, coloured. Wither. 74? Huds. 

 Angl. 32? This is not the Jgrostis capillaris of Linnaeus, — 

 an error long since pointed out by Sir J. E. Smith. 



Ohs. — Culm ascending, from six to twelve inches high, round, 

 very smooth, with three or four joints ; leaves very narrow, 

 sheathing the straw for some length ; sheath-scale membran- 

 aceous, acuminate; panicle upright: branches hair-like, some- 

 what flexuose ; valves of the calyx nearly equal, ovate-lan- 

 ceolate, concave, bluntish. This variety is nearly akin to 

 the Agrostis camna fascicular is; it grows pretty common in 

 some parts of Woburn Park, where the soil is siliceous. 



Native of Britain. Root perennial. Hort. Gram. Fol. 183. 



German, var. Gemeines-straussgras. 



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

 sandy loam is — 



Produce per Acre, 

 dr. qr. lbs. 



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



80 dr. of grass weigh, when dry - 22 0^ iQiO'^n 

 The produce of the space, ditto - 30 3^^ 5 



The weight lost by the produce of one acre in drying 3454 3 

 64 dr. of grass afford of nutritive matter 2 ^ ids 14 

 The produce of the space, ditto - 3 2 5^ 



The above details afford no proofs of the value of this for agri- 



