78 METASPERMAE OF THE MINNESOTA VALLEY. 



POA LINN. Gen. 55 (1737). 



Leuconoa GRISEB. Led., Fl. Ross. IV, 383 (1853). 

 Poidium NEES, Lindl. Introd. Nat. Syst. ed. 2, 450 (1835). 

 Benth. and Hook., Gen. PL III, 1196; Durand, Ind. Gen. Phan. 478; 

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



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

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

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

 Calif., 10-11. 



Poa nemoralis LINN. Spec. 69 (1753). 



Fesluca airoides LAM. Enc. Meth. II, 464 (1786). 

 Poa cinerea YILL. 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. glaucantha 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). 

 Poapalustris DC. Fl. Fr. VI, 272 (1815). 

 Ccdabrosa elodes R. and S. Syst. II, 696 (1817). 

 Poa firmula GAUD. Fl. Helv. I, 239 (1828). 

 P. caesia AUCT. AMER., not Sm. 

 P. caesia var. strictior GRAY, Man. ed. V, 628 (1868). 

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

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

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

 Eur.; Wats., KingExp. 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. 



HERB. : Bailey 469, Agate Bay; Bailey 434, Basswood 

 Lake; Sandberg 575, Red Wing; Sandberg 576, Red Wing. 



Poa palustris LINN. Syst. 874 (1759). 

 P. serotina EHRH. Beitr. VI, 86 (17pl). 

 P. riparia WOLF. Hoffm., Fl. Dan. 42 (1791). 

 P. triflora GILIB. Exerc. Phyt. II, 531 (1792). 

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

 P. hydropfiila PERS. Syn. I, 89 (1805). 

 P. angustifolia WAHL. Fl. Ups. 66 (1820). 

 P. exigua DUM. Belg. Agr. 113 (1823). 

 ? P. crocata MICHX. Fl. N. Amer. I, 68 (1803). 



