GBA8SY NOOKS. 157 



stiff sword-like leaves. The Moating Sweet Grass 

 (Q . fluitans) is common by tlie margin of ponds. On 

 salty marshes we may find the Keflexed Sweet Grass 

 (Gr. distans) ; but the Hardy variety (G. rigida) is a 

 small plant frequenting the tops of walls and sandy 

 places. 



The Cock's-foot Grass is perhaps as well known as any. 

 We have only one British species (Dactylus glomerata), 

 but its coarse herbage and distantly branched panicle, 

 the stem resembling the claws of a cock's foot, mark 

 its peculiarity. Its characteristics are two sharp 

 pointed glumes, which are keeled, and enclose from 

 three to six florets. 



The Heath Grass (Triodia decumbens) is a rigid 

 grass, growing in tufts, with round paleae and concave 

 glumes. The panicle, which grows on a stem which 

 often leans at an acute angle towards the ground, has 

 four florets on each spike. It is common on swampy 

 ground and on moors. 



On muddy salt marshes the Cord Grass (Spartina 

 stricta) may be found. Its leaves are rolled in, ribbed, 

 and pointed. 



Of Dog's-tail Grasses (Cynosurus) we have two 

 species : they have both glumes and pales awned, and 



