OF MABINE COASTS. 139 



On marine coasts of Europe, from English Channel along west eoasi 

 to Mediterranean and Caspian Sea. 



L. repens E. Br. 



Perennial, creeping grass, with branching stems; leaves spreading, 

 glaucous, glabrous. 



Drifting sand on some islands of the tropical coast of Queensland 

 and in Southern Pacific. 



Paspalum distichum L. 



Stems creeping and rooting, ascending to 4 dm., covered with leaf- 

 sheaths; leaves linear-lanceolate, flat, glabrous. 



Widely dispersed in tropical countries, usually on heavy soil, but oc- 

 casionally on coastal sands. Also in Australia, from Queensland along 

 the southern coast to West Australia, in New Zealand, and in North 

 America from Southern California to Florida. 



Phleum arenarium L. 

 Annual, erect, 5 — 20 cm. high; leaves short. 

 Coastal sands of Europe, from Mediterranean to the Baltic. 



Poa compressa L. 



Perennial, with creeping rootstock; stems erect, 10 — 30 cm. high, 

 flattened at base; leaves short, with flattened sheaths. 



Widely dispersed in Europe, Northern Asia, and North America ex- 

 cept the arctic region. Frequently on coastal sands, but not confined 

 to these. 



P. Douglasii Nees. 

 Perennial grass, with slender, widely creeping rootstock; stems 

 tufted, 20 cm. high. 



Peculiar to the coastal driftsands of California. 



Polypogon Utoralis Smith. 



Perennial, procumbent, tufted, 3 — 6 dm. high, leaves short, narrow, 

 scabrous on both sides. 



S'alt marshes and dune lagoons on sea coasts of Western Europe, 

 Mediterranean, North and S'outh America. 



P. monspeliensis Desf. 

 Annual, procumbent and geniculate at base, 3 — 5 dm. high; leaves 

 flat, broad, somewhat scabrous; sheaths smooth. 



