CE. III.] TRIANDBIA. DIGYNIA. 83 



5. P. trividlis. Roughish Meadow-grass. Panicle spreading : 

 spikelets oblong, of about three acute, five-ribbed flowers, con- 

 nected by a web ; straw and sheaths roughish ; root fibrous. 



From one to two feet high -. leaves linear, acute : panicle large, with 

 half-whorled, rough branches, and green flowers. A valuable grass 

 for pasturage and hay. Perennial : flowers in June and July : grows 

 in meadows and pastures : very common. Eng. Bot. vol. xv. pi. 1072. 

 Eng. Fl vol. L p. 124. 160. 



6. P.pratensis. Smooth Meadow-grass. Panicle spreading ; spike- 

 lets oblong, of about four acute, five-ribbed flowers, connected by a 



web ; straw and sheaths smooth ; root creeping. About a foot 



high: leaves linear, acute: panicle with half-whorled, smooth 

 branches, and pale-green flowers. One of the most valuable pas- 

 ture plants. Perennial : flowers in June and July : grows in 

 meadows and pastures : abundant. Eng. Bot. vol. xv. pi. 1073. 

 Eng. Fl. vol. i, p. 1 26. 161. 



I.P.dnnua. Annual Meadow-grass, Panicle somewhat unilateral, 

 with spreading or deflected branches: spikelets egg-shaped, of 

 about five somewhat distant, fire- ribbed flowers, destitute of a web ; 



straw ascending, a little compressed ; root fibrous. Straws about 



six inches long, decumbent and rooting at the base : panicle pale- 

 green. The whole plant tender and rather succulent. Annual : 

 flowers the whole year round : grows by roads, and wherever there 

 is loose earth : abundant. Eng. Bot. vol. xvi. pi. 1141. Eng. Fl. 

 vol.i. p. 126. 162. 



8. P. nemordlis. Wood Meadow-grass. Panicle spreading, with 

 hair-like branches; spikelets lance-shaped, of about three five- 

 ribbed, acute flowers, silky on the keel and lateral ribs, and hairy 

 at the base, without a web. The whole plant slender and deli- 

 cate : straws erect, about two feet high : leaves linear, flat, tapering 

 to a fine point, roughish : panicle erect. Perennial : flowers in 

 June and July : grows in woods. Eng. Bot. vol. xviii. pi. 1265. 

 Eng. Fl. vol. i. p. 130. A small glaucous variety, found abundantly 

 on the Scotch and Welsh mountains, has been named P. glauca, 

 Glaucous Meadow-grass. Eng. Bot. vol. xxiv. pi. 1720. Eng. Fl. 

 vol. i. p. 128. 163. 



31. TBIO'DIA. HEATH-GRASS, 



Calyx of two nearly equal, egg-shaped, keeled, acute, awn- 

 less chaff-scales, containing an egg-shaped, imbricated spikelet, 

 of several perfect flowers, which are hairy at the base, but desti- 

 tute of web. Corolla of two unequal, egg-shaped, stiff husks ; 

 the outer obscurely ribbed, rounded on the back, flat and ex- 

 panded on the edges, deeply cleft at the summit, with an inter- 

 mediate short awn or tooth ; the inner smaller, fringed, cleft at 

 the point. Nectary of two scales. Filaments hair-like ; anthers 

 protruded, pendulous. Germen oval, flat. Styles short, dis- 

 tinct ; stigma cylindrical, feathery. Seed loose, depressed, con- 

 vex on the outer, concave on the inner side. Named from treis, 

 three, and odous, a tooth. 47. 



1. T. decumbens. Decumbent Heath-grass. Panicle erect, close, 

 with nearly simple branches ; spikelets four- flowered ; chaff-scales 

 smooth. The whole plant stiff, decumbent; straw from four 

 inches to a foot long, smooth: panicle of a few large, purple spike- 



