AGROSTIDE^. 



313 



yellowish sliiuing green, 3-8 cm. long, 1-2 cm. diam. Spikclets 

 luirrow, very numerous, nearly concealed by the slender awns, the 

 liairs at the base few and very short, narrow, about 2 mm. long; 

 empty glumes pubescent or ciliate, obtuse or retusc, elliptical, 

 1-nerved, awns 4-7 mm. long; floral glume 1 mm. long, broad hya- 

 line, truncate-jagged, awn as long as the floret, shorter or wanting; 

 palea 2 -toothed. 



Georgia, CVrtr^- 2951; Kansas, Ilenrij; Colorado, 6V/.s>'?W//; ^fon- 

 tana, Anderson 18; Washington, Lake, Sandbery 280; Oregon, 

 Howell; California, Sones 100, Parish 868; Arizona, Tovmey 772. 



Introduced on the coast of both oceans; also in Colorado, Mon- 

 tana, Nevada, Utah, Kansas; also found in Australia and in most 

 temperate and subtroj^ical regions of the Old A^'orld. It is considered 

 a weed, though it is sometimes cultivated for ornament, 



2. P. MARiTiMUS Willd. Ges. Naturf. Fr. Xeue Sclir. 3:442 

 (1801). Alopecnrus maritimns Poir. Eucyc. 8:780 (1804). 



An erect annual; culms sim- 

 ple, 15-30 cm. high. Ligule 4 

 mm. long; blades flat. Spike 

 dense, 2-4 cm. long. Empty 

 glumes equal, villous at the tips 

 and 2-lobed, awn 4-6 mm. long; 

 floral glume 7 mm. long, 4- 

 toothed. 



Introduced on the sea shore of 

 North and South Carolina, Chaj)- 

 man. 



3. P. elongatus (Poir.) H. B. 

 K. Nov. Gen. et Sp. 1 : 134 (1815). 

 Alopecurns elongates Poir. En- 

 cycl. Suppl. 5:495 (1804). 



Erect, geniculate below, 60- 

 90 cm. high. Sheaths smooth, 

 about the length of the inter- 

 nodes; ujiper ligule broad, obtuse, 

 4-6 mm. long; blades flat, nearlv smooth, 12-16 cm. long, 4.7 mm. 



Fig. 54. — Polypogon elongaius. A, 

 spikelet; a, floret. (iScribiier.) 



