168 MONOCOTYLEDONS. GRAMINE.i:. Bri%a. 



5. P. procumbens, panicle compact ovato-lanceolate disticho- 

 secund (rigid), spikelets linear-lanceolate of about 4 flowers 

 which are 5-ribbed. p. 33. Salt marshes. 



6. P. rigida, panicle lanceolate disticho-secund (rigid), spikelets 

 linear acute of about 7 flowers which are almost ribless, root 

 fibrous, p. 33. Walls and dry banks. 



7. P. compressa, panicle subsecund spreading (afterwards subco- 

 arctate), spikelets oblongo-ovate of from 5 7 obtuse flowers 

 connected by a web, culm compressed, root creeping, p. 34. 

 Walls. 



8. P. alpina, panicle diffuse, spikelets ovate of 4 5 acute 

 flowers hairy below (but not webbed), leaves broadly linear 

 obtuse, ligule of the upper leaves oblong acute, of the lower 

 ones short obtuse, p. 34. Alps. 



9. P. laxa, panicle contracted lax slightly drooping, spikelets 

 ovate of about 3 flowers which are acute connected by a web, 

 leaves linear acute narrow, ligules all lanceolate, p. 34. Alps. 



10. P. ccesia, " panicle spreading, spikelets ovate 5-flowered, 

 glumes lanceolate silky-edged unconnected by any web, ligule 

 very short and blunt. " p.34.~Alps. 



1 1. P. trivialis, panicle diffuse, spikelets oblongo-ovate of about 



3 flowers which are acute 5 -nerved connected with a web, 

 culms and sheath roughish, ligule oblong, root fibrous, p. 35. 

 Meadows. 



12. P.prate?isis, panicle diffuse, spikelets oblongo-ovate of about 



4 flowers which are acute 5-nerved webbed, culm and sheaths 

 smooth, ligule short, root creeping, p. 35. Meadows. 



13. P. annuOf panicle subsecund divaricated, spikelets oblongo- 

 ovate of about 5 flowers which are a little remote 5 -ribbed 

 destitute of web, culm ascending compressed, root fibrous. 

 p. 35. Pastures. 



14. P. nemoralis, panicle slender slightly leaning one way lax 

 attenuate, spikelets lanceolate of about 3 rather distant slight- 

 ly webbed flowers, ligule short truncate, culrns subcompressed 

 and sheaths glabrous, root subrepent. p. 35. Woods and 

 mountains. 



15. P. decumbens, panicle nearly simple contracted few-flower- 

 ed, glume as long as the four-flowered spikelet, ligule a tuft of 

 hairs, p. 36. Mountain pastures. 



19. BRIZA. 

 Glume 2-valved, many-flowered. Perianth, 2-valved, ventricose, 



the valves cordate, obtuse, awnless. Caryopsis adnate with 



the perianth. 

 1 . Br. media, spikelets broadly ovate of about 7 flowers, glume 



shorter than the florets, p. 37. Pastures. 



