BESCEIPTIONS OF SPECIES. 



2f 



Wood meadow grass 

 (Poa nemoralis). 



Silky pubescence of the 

 veins mostly present and 

 prominent. 



Apex of the glume slen- 

 derly pointed or nar- 

 rowly flaring. 



Intermediate veins indis- 

 tinct. 



Rachilla segment pubes- 

 cent, often more than 

 half the length of the 

 glume. 



Kentucky bluegrass (Poa 

 pratensis); Rough-stalked 

 MEADOW GRASS {Poa trivi- 



alis). 



Canada bluegrass 

 (Poo compressa) . 



Silky pubescence of the veins wanting or but slight. 



Apex of the glume acute. Apex of the glume broadly 



flaring. 



Intermediate veins dis- Intermediate veins indis- 

 tinct, tinct. 



Rachilla segment smooth, not exceeding half the length 

 of the glume. 



Poa triflora Ehrh. (P. flava L., P. serotina Ehrh.). 



FOWL MEADOW (iKASS, FALSE REDTOI'. 



Spikelets 2-4 flowered; florets 2-2^ mm. long, lanceolate or ovate-lanceolate as 

 viewed from the back, broadly keeled and strongly arched at the back, light brown 

 and usually strongly tinged witli yellow above the middle, sometimes purplish, 

 margins of the glume narrowly infolded below the middle or quite to the apex, 

 which IS hyaline-edged, expanded but scarcely flaring; intermediate veins indis- 

 tinct; keel and marginal 

 veins silky pubescent below 

 the middle; basal web 

 slight; palea nearly or quite 

 equal to the glume, finely 

 hispid-ciliate on the keels, 

 which are mainly covered 

 Ijy the glume margins in the 

 lower florets; rachilla seg- 

 ment slender, glabrous or 

 sometimes slightly scabrous, from one-fourth to one-half or two-thirds the length of 

 the glume; aborted floret of the sterile rachilla segment often prominent and nearly 

 as long as the rachilla segment; grain 1 mm. long, comparatively robust and smooth, 

 scarcely keeled or grooved, semitranslucent. (Fig. 8.) 



Most, if not all, of the seed of F. triflora on the market appears to 

 be of foreign production. The samples examined have proved to be 

 the worst found among the bluegrasses. It is prol)able that a better 

 grade of seed could be secured from the natural meadows in this coun- 

 try where this species often constitutes the principal grass. The 

 seeds of P. triflora are very similar to those of Canada bluegrass and 

 wood meadow grass. 



Fig. 8. — Seeds of fowl meadow grass (Poa triflora): a-c, back 

 views; d and c, side views; /-/(, front views; h, a terminal floret. 



