CH. v] Key to Floral Characters 37 



Milium (p. 118). 

 Agrostis vulgaris (p. 56). 

 A. alba (p. 54) (sometimes has basal awn). 

 2. At least two perfect flowers in each s pikelet. 



(a) With awns or awn-points to outer palecv, which are : 

 Terminal in Festuca (p. 99). 



F. ovina and vars. (p. 101), leaves permanently 



closed. 

 F. elatior (p. 99). Leaves expanded. Spikelets 



5-10 flowered. 

 F. sylvatica (p. 104). Leaves expanded. Spikelets 



3-5 flowered. 

 Arundo Phragmites (p. 66), panicle large and 



silky; spikelets 3-flowered. 

 Sub-terminal in Bromus (p. 79J. 



B. arvensis and vars. (pp. 79-82), O.P. broad. 

 B. sterilis (p. 82), panicle drooping; O.P. 



narrow and long; awn longer than O.P. 

 B. asper (p. 85), panicle drooping; awn shorter 



than the O.P. Shade species. 

 Dorsal or Basal in: 



Avena (p. 68), awns bent, long, and conspicuous. 

 Aira (p. 56), awns fine, not conspicuous. 



(b) Outer palece without awns or awn- points. 



Poa (p. 122), spikelets with 2-7 flowers; O.P. less 

 than 4 mm. long. 

 P. annua (p. 122), u web" wanting; spikelets 



4-7 flowered. 



P. pratensis (p. 127), O.P. 5-nerved, the' 

 marginal nerves hairy below ; spike- 

 lets 3-5 flowered. I" Web" 

 P. compressa (p. 123), O.P. 3-nerved, of 



spikelets 4-7 flowered. 



hairs 



P. trivialis (p. 129), O.P. 5-nerved, the L at 



marginal nerves free from hairs; 

 spikelets 2-5 flowered. 

 P. nemoralis (p. 125), O.P. 5-nerved, 

 both dorsal and marginal nerves 

 hairy below; spikelets 3-5 flowered 



base 



of 

 paleae 



