36 Botanical Section [PT i 



Psamma (p. 129), sea-shore grass with long rhizomes, 



panicle 4-6 inches long. 

 2. Inner palea wanting. 

 Alopecurus (p. 59). 



A. agrestis (p. 61), panicle long and tapering. 

 A. pratensis (p. 59), panicle blunter at apex. 

 A. geniculatus (p. 61), an aquatic species with 



"kneed" culms. 

 TYPE B. Panicle contracted and tufted. 



Dactylis (p. 93), spikelets rough and dull ; 3-5 flowered. 

 Kceleria (p. 112), spikelets silvery; 2-3 flowered. 

 Digraphis arundinacea (p. 95) may come here; 



spikelets one-flowered. 



TYPE C. Panicle close; though the inflorescence is elongated 

 'the spikelets keep near the main axis. 



1. Branches simple and few. 



Triodia (p. 132), outer palea 3-toothed at apex. 



2. Branches divided. 



(a) No awns or awn-points to paleae. 

 Molinia (p. 118), spikelets 2-3 flowered. 

 Glyceria fluitans (p. 105), spikelets 8-16 flowered. 

 (6) With awns or awn-points to paleae. 



Festuca ovina (p. 101), terminal awn-points (may 



sometimes come here). 

 F. Myurus (p. 100), long terminal awns. 

 Aira prcecox (p. 59), awns dorsal, or almost basal. 

 TYPE D. Panicle lax, open and spreading, at least during the 



flowering period. 



1. One perfect flower only in each spikelet. 

 (a) Awns or awn-point to outer palea. 



Arrhenatherum (p. 63), lower flower staminate. 



Holcus (p. 106), upper flower staminate. 



Agrostis canina (p. 56), very small one-flowered 



spikelets with protruding dorsal awn. 

 (6) No awn or awn-point. 



Digraphis arundinacea (p. 95), two hair-tufts at base- 



of paleae. 

 Melica uniflora (p. 118). 



