184 HOHTUS GRAMJNEUS WOBURNEXSIS. 



to the disease, to distinguish them from those that are always 

 affected by it when transplanted to exposed situations, only that 

 the former grasses are smooth, or have their surface free from 

 hairs, while the latter are in general hairy, or have their surface 

 furnished with numerous hairs. The Bromus sylvaticus (wood 

 brome-grass), and Festuca pinnata (spiked wood fescue), are 

 subject to the rust likewise, when taken from their natural places 

 of growth : these grasses have hairs, but they are minute, and 

 thinly scattered on the leaves. The early growth of this grass in 

 the spring, and its remarkably fine, succulent, and nutritive herbage, 

 recommend it strongly for admission into the company of the su- 

 perior permanent pasture grasses. 



The wood meadow-grass flowers in the third week of June, 

 and ripens the seed in the end of July. 



POA angustifolia. Narrow-leaved meadow-grass. 



Poa pratensis, var. : Panicle diffused; spikelets 4-flowered, 

 pubescent; culm erect, round. Linn. Spec. 99. Fig. 1. Germ. 

 2. Florets, magnified. 



Obs. Sir James Edward Smith regards this as a variety of the 

 Poa pratensis, and its botanical characters are certainly not 

 sufficient to constitute it a species distinct from Poa pra- 

 tensis ; but as it differs much from that species in its agricul- 

 tural merits, being much superior, I have kept it distinct 

 from that species, that it may more readily impress the me- 

 mory. See Sm. Engl. Fl. i. p. 126. 



Native of Britain. Root creeping. Perennial. 



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

 brown loam is 



Produce per Acre, 

 dr. qr. Ibs. 



Grass, 27 oz. The produce per acre 18376 14 



80 dr. of grass weigh, when dry 34 i 



The produce of the space, ditto - 183 2JJ 



The weight lost by the produce of one acre in drying 10566 11 4 

 64 dr. of grass afford of nutritive matter 507 ^QQ Q n 

 The produce of the space, ditto 33 3 5 



At the time the seed is ripe the produce is 

 Grass, 14 oz. The produce per acre 9528 12 



80 dr. of grass weigh, when dry 32 07 



The produce of the space, ditto - 89 2-|- J 



