362 



MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



Figure 507. — Alopecurus carolini- 

 anus. Plant, X 1; glumes and 

 floret, X 10. (Kearney 1147, Va.) 



*Ui 



"lata 

 - Hflr 



Figure 508. — Alopecurus 

 kowellii. Panicle, X 1; 

 glumes and floret, X 10. 

 (Gilbert 78, Oreg.) 



and indurate on the back about the 

 middle; awn 5 to 10 mm. long. O 

 — Waif, ballast, old Navy Yard, Phil- 

 adelphia, Pa.; Europe. 



Figure 509. — Alopecurus saccatus. Panicle, X 1 ; 

 glumes and floret, X 10. (Suksdorf 188, Wash.) 



Alopecurus arundinaceus Poir. Tall 

 rhizomatous perennial; blades 3 to 10 

 mm. wide; panicle 4 to 10 cm. long, 

 7 to 8 mm. thick, often purplish; 

 spikelets 4 to 5 mm. long; glumes 

 sparsely pubescent, long-ciliate on 

 the keel; lemma about equaling the 

 glumes, the awn included or exserted 

 1 to 3 mm. % — Advent ive in hay 

 meadows, Labrador; North Dakota; 

 Eurasia. 



77. POLYPOGON Desf. 



Spikelets 1-flowered, the pedicel disarticulating a short distance below the 

 glumes, leaving a short-pointed callus attached; glumes equal, entire or 

 2-lobed, awned from the tip or from between the lobes, the awn slender, 

 straight; lemma much shorter than the glumes, hyaline, usually bearing a 



