n6 



THE GENERA AND THEIR SPECIES. 



downy. Stems many, in wiry tufts, erect, rather angular, striated. 



Leaves like bristles, sharp, straight, furrowed, rough with lines 



of spines, base thick and cartila- 

 ginous, mostly horizontal. Sheaths 

 pinkish, enlarged, bulbous at base, 

 each outer sheath enclosing two or 

 more leaves, of which the inner is 

 erect ; ligule on radical leaves trun- 

 cate, on stem leaves pointed, 

 thick, stiff, and prominent. Spike 

 slender, straight or curving back- 

 wards. Spikelets with one floret, 

 alternate, unilateral, placed in 

 grooves, only one glume, and that 

 very narrow and pointed. Outer 

 palea linear - lanceolate, purplish, 

 ribbed, rough, tapering into an 



awn ; inner palea thin, short, narrow, embraced by outer palea, 



ribless, apex truncate and toothed. Anthers pale yellow. 



Nardus stricta. 



Spikelet. 



For Ovary and Stigma see p. 58. 



Panicum. Plates ii. and hi. PANICEZE. 

 Spike digitate. 



3. sanguinale 24 in. Finger Grass. Leaves and sheaths hairy. 



4. glabmm 8 in. Glabrous Finger Grass. Leaves and 



sheaths glabrous 

 Spike simple. 



5. verticillatum 24 in. Rough Bristle Grass. Involucral bristle 



depressed. 



6. glaucum 24 in. Glaucous Bristle Grass. Involucral 



bristles erect ; outer palea with transverse 

 wrinkles. 



7. viride 24 in. Green Bristle Grass. Involucral 



bristles erect ; outer palea un wrinkled. 

 Spike compound. 



8. crus-galli 36 in. Cockspur. Spikelets purple on one side, 



