Panicum virgatum, Switch Grass 



Large coarse grass in thick hummocks or tus- 

 socks. Blade 10-15 mm wide, ligule a fringe of 

 hairs. Loose widely spreading flower panicle. 

 Grass in the transition zone of the marsh border, 

 sometimes at the edge of beaches and dunes. 



Figure 100.— Ligule X2. 



in. Beach 



Bromus tectorum, Cheat 



An annual grass, growing early in the season 

 and becoming brown and dead by midsummer. 

 Blade 5-8 mm wide, ligule membranous 1.5-3 mm 

 long, rounded to acute. Very loose panicle, re- 

 curving flexuous branches with long awns 

 (bristles) resembling oats, often purple in color. 



Figure 101.— Ligule X2. 



86 (27) Cyperaceae 



L Dunes 



Cyperus grayii, Gray's Sedge 



Rhizomes with hard cormlike swollen branches; stems wiry, filiform, leaves gray- 

 green to 3 dm tall; flowers in nearly spherical heads on 3-14 stiff capillary smooth 

 stems forming an umbel; in sandy hollows of dunes. It is suggested that a more 

 inclusive manual be referred to for verification. 



Cyperus spp. 



Other species of Cypertcs may occur in the dunes or at the edge of dunes. Identi- 

 fication should be made by the use of one of the manuals (Fernald, 1950; Gleason 

 and Cronquist, 1963) or referred to a botanical taxonomist. 



40 



