VEGETATIVE ORGANS OP GRASSES 



355 



Dactylis glomerata. Orchard Grass. Figure 130. 



A coarse, lig-ht green, tufted perennial. Rhizomes, short, thick, 

 nodes scarcely distinguishable, the new shoot Rowing from the 

 old rhizome, followed 'by a number of shoots, forming a tuft, 

 culms somewhat decumbent at base. R-oots long, coarse, having 

 many root hairs. Leaves when young conduplicate, long, keeled, 



Fig. 131. Hordeum jubatum. Squirrel Tail, 

 corm : C, Bheath ; D. old culm ; E, blade. 



A, ligule ; B, rudimentary 



folded in bud along midnerve. Blade one-fourth inch or more 

 wide, scabrous, flat, keeled, broad, soft in texture, drooping, 

 sharp-pointed; culms erect, smooth; young shoots flat, keeled. 

 Slieaths compressed, white at base, somewhat scabrous. Ligule 

 elongated, toothed, membranous, lacerate. Auricles wanting. 

 Collar light yellow, broad, conspicuous. 



