24 TRIANDRIA DIGYNIA. 



30. POA. 



1. P. trivialis, panicle spreading ; spikelets 3-flowered ; florets 

 lanceolate, 5-ribbed, connected by a web ; stipula oblong ; stem 

 and leaves roughish ; root fibrous. Roughish Meadow-grass. 



Hab. Meadows and pastures. June-Oct. If 



In moist rich soils one of the most valuable grasses, whether 

 for pasturage or hay ; its produce and nutritive powers 

 being both very great. 



2. P. joraterms, 'panicle spreading ; spikelets 4-flowered ; florets 

 lanceolate, 5-ribbed, connected by a web ; stipula short and ob- 

 tuse ; stem and leaves smooth ; root creeping. Smooth Meadow- 

 grass. 



Hob. Meadows and pastures. The P. subccerulea of Eng, 

 Botany, a variety of the present species remarkable for 

 the glaucous hue of its whol^ herbage, grows abund- 

 antly in Yarrow Haugh, and on the Farn "isles, accord- 

 ing to my friend Dr THOMPSON. June, July. 7/ 



As an object of agriculture this is not less valuable than the 

 preceding. It is earlier in leaf, and will thrive with less 

 moisture, but is said to exhaust the soil in a much greater 

 degree. The roots are numerous and creeping, and be- 

 come in two or three years, especially in a dry soil, so 

 matted together, that the ingress of nourishment is hin- 

 dered, and the produce gradually diminished. 



3. P. annua^ panicle widely spreading ; spikelets ovate, 5-flow- 

 ered ; florets a little remote, 5-ribbed, without a web ; stems 

 oblique, compressed ; root fibrous. Annual Meadow-grass. 



Hab. Meadows and pastures, waste and cultivated ground, 

 very common. April-Nov. 



31. TIUODIA. 



1. T. decumbens, panicle nearly simple, close, erect ; florets 4, 

 their middle tooth shortest ; calyx smooth ; stipula hairy. (One 

 foot long, procumbent, flowering stem only erect ; leaves linear, 

 rigid, acuminate, hairy as well as the sheaths.) Decumbent Heath- 

 grass. 



Hab. Dry mountain pastures, frequent. Sea-banks from the 

 Burgesses' Cove northward ; banks beyond Spittal ; Mur- 

 ton Craigs, Thomp. July. If 



