342 GLUMACE^E 



i side, about J inch long. Sandy sea-shores ; not common. Fl 

 June, July. Annual. 



35. Briza (Quaking Grass) 



1. B. media (Common Quaking Grass). Erect, rather stiff, i-i 

 feet high ; leaves flat, narrow ; panicle 2-4 inches long ; spikelets 

 at first circular, then ovate, \-\ inch long, green and purple, 

 about 6-flowered. Meadows, etc. ; common. Fl. June. Perennial. 

 (PI. xciii.) 



2. B. minor (Lesser Quaking Grass). Smaller than B. media, 

 the ligules much longer, panicle more branched and more slender, 

 and spikelets smaller. Dry fields and waste places in the south- 

 west. Fl. July. Annual. 



3. B. maxima (Greatest Quaking Grass). Known by its very 

 large spikelets, which are few and are about inch long. Not 

 native, but often cultivated ; naturalised in Guernsey. Fl. June, 

 July. Annual. 



36. Catabrosa (Whorl-Grass) 



I. C. aquatica (Water Whorl-Grass). Glabrous, pale green, the 

 young leaves and stem sweet to the taste ; stems creeping or float- 

 ing at the base, rooting at the joints, sometimes 2-3 feet long ; 

 leaves short, flat, broad, obtuse ; panicle spreading, 4-6 inches long ; 

 spikelets about \ inch long. Shallow pools and wet ditches ; fre- 

 quent. Fl. June, July. Perennial. 



37. Cynosurus (Dog's-tail-Grass) 



1. C. crislatus (Crested Dog's-tail-Grass). Slightly tufted ; 

 stems slender, f 2 feet high ; leaves narrow ; spike 1 -sided, narrow, 

 1-3 inches long. Rather dry pastures, etc. ; very common. Fl. 

 August. Perennial. (PI. xciv.) 



2. C. echinalus (Rough Dog's-tail-Grass). Easily distinguished 

 from the last by the ovoid, much less regular spike and the distinct 

 awns to the glumes. Sandy pastures in the Channel Islands ; very 

 rare ; occasionally in England as a weed. Fl. July. Perennial. 



38. Dactylis (Cock's- foot-Grass) 



1. D. glomerata (Cock's-foot-Grass). Coarse, 1-2 feet high, form- 

 ing dense tufts ; leaves very rough ; spikelets ovate, much flattened, 

 3-5-flowered, in dense ovoid clusters which sometimes form a 

 solitary thick spike 1-2 inches long, or there may be several such 

 spikes arranged in a panicle several inches long ; flowering glumes 

 often shortly awned. Meadows and waste ground ; common. Fl. 

 June, July. Perennial. (PI. xciv.) 



