78 METASPERMAE OF THE MINNESOTA VALLEY. 



POA Linn. Gen. 55 (1737). 



Leuconoa Griseb. Led., FL Ross. IV, 383 (1853). 

 Poidiuin Nees, Lindl. Introd. Nat. Syst. ed. 2, 450 (1835). 

 Benth. and Hook., Gen. PI. Ill, 1196; Durand, Ind. Gen. Pftan. 478; 

 Engler and Prantl, Nat. Pjlanz. 2, II, 73 (Hackel). 



Living species: 100; cosmopolitan; tropical mts. Eu- 

 rope, 41; Russia, 25; N. America, 40; Canada, 29; PI. King, 

 11; PI. Wheel.. 10; Rocky mts., 12; E. Sts., 10; S. Sts , 8; 

 Calif., 10-11. 



Poa iiemoralis Linn. Spec. 69 (1753). 



Festuca airoides Lam. Enc. Meth. II, 464 (1786). 



Poa cinerea Till. Dauph. II, 156 (1787). 



P. debilis Thuill. FL Par. 43 (1790). 



P. nutans Gilib Exerc. Phyt. II, 532 (1792). 



P. juncea SuT. Fl. Helv. I, 46 (1802). 



P. gluucantha Gaud. Alp. Ill, 36 (1808). 



P. gracilescens Schrad. Hort. Gott. I (1809). 



P. glauca Bast. Ess. 39 (1809). 



Aira elodes Brign. Fl. For. 10 (1810). 



Poapalusti-is DC. Fl. Fr. VI, 272 (1815). 



Catahrosa elodes E. and .S. Syst. II, 696 (1817). 



Poo firmida Gaud. Fl. Helv. I, 239 (1828). 



P. caesia Auct. Amer., not Sm. 



P. caesia A^ar. strictior Gray, Man. ed. V, 628 (1868). 

 Wats, and Coult., Gray's Man. 6 ed. 664; Upham, Fl. Minn. 167: Mac, 

 Fl. Can. IL 223, 225: Webb., Fl. Neb. 101; Coult., Fl. Colo. 421: Richt., 

 PI. Eur. I, 85: Led., Fl. Ross. IV, 374; Hook., Fl. Gt. Brit. 492; Nym., Fl. 

 Eur.; Wats., King Exp. 386; Cov., Fl. Ark. 237; Hart., Fl. Scand. I, 498; 

 Rothr., Alask. 458. 



Arctic and Northern Europe to Mediterranean; Siberia 

 to Himalayas. 



North America: Greenland, Labrador, N. S. to Sas- 

 katchewan, N. W. T., Brit. Col. and Rockies; S. to Maine and 

 Vt; W. to Minn., Neb. and Colo. Ark. ? Alaska. 



Minn, valley: Forest district; dry and open places; 

 infrequent. 



Heru. : Bailey 4(>i), Agate Bay; Bailey 434, Basswood 

 Lake; Sandbev(j 575, Red Wing; Sandbevf/ 576, Red Wing. 



Poa palustris Linn. Syst. 874 (1759). 

 P. serotina Eiikh. Beitr. VI. 86 (1791). 

 P. riparia WoLK. Hoffm., Fl. Dan. 42 (1791). • 

 P. trijiora Gilib. Exerc. Phyt. II, 531 (1792). 

 P. fertilis Host. Gram. Ill, 10 (1805). 

 P. lofdropliUa 1'ers. Syn. I, 89 (1805). 

 P. anyustifolia Waul. Fl. Tps. 66 (1820). 

 P. exUjua DUM. Bely. A^'r. 113(1823). 

 ? P. cromta Micnx. Fl. N. Amer. I, 68 (1803). 



