LIST OF HIGHER SEED PRODUCING PLANTS. 193 



Genera: 13; tropical and extratropical. 

 Species: 125 ± ; 50-60 fossil; Eocene to Recent. 



VLMUS Linn. Gen. 194 (1737). 



Chaetoptelea Lteum. Vid. Med. Kiob. (1850). 

 3Iicroi>telea Spach, Am. Sci. Nat. 2, XV, 358(1841). 

 Baillon, Hist. PL VI, 184; Benth. and Hook., Gen. PI. Ill, 351; Durand, 

 Ind. Gen. Phan. 373; Engler and Prantl, Nat. Pjianz. 3, I, 62; Schenck, 

 Palaeophyt, 470. 



Living species: 16; temperate N. hemisphere; mts. 

 in tropical Asia. Europe, 3; Russia, 8; Russian Europe, 7; 

 S. Sts., 5; Rocky mts., 1; E. Sts., 4; Canada, 3; PL Wheel., 1; 

 N. America, 6-7. 



Fossil species: Ulmiphylbnn, Lower Cretaceous {Fon- 

 taine) — Potomac river beds, 3 sp. Ulmus, 30-45 sp. described; 

 Eocene, rare; Oligocene aVundant — Grinnell-Land, Greenland, 

 Saghalin, Japan, Switzerland, Alaska, Colorado [Lesquereaux, 

 Saporta, Heer, Unger, Watelet, etc. ). 



Ulmus racemosa Thomas, Am. Jour. Sci. Ser. 1, XIX, 170 

 <1831). 



TJ. americana Planch. DC. Prodr. XVII, 155 (1873) in jxirt. 

 Wats, and Coult., Gray's Man. 6ed. 462; Britt., Fl. N. J. 216: Mac, Fl. 

 Can. 428: Upham, Fl. Minn. 124. 



North America: Q., Ont. to S. W. Vt. and N. J.; W. to 

 Minn., Ky. and Mo. 



Minn, valley: Forest district to Chippewa valley; 

 infrequent or rare; woods and along streams. 



Herb. : Moyer 220 \ Cedar lake, near Montevideo. 



Ulmus americana Linn. Spec. 226 (1753). 



V. mollifolia Marsh. Arbust. Amer. 156 (1785). 



U. americana var. pendula Ait, Hort. Kew. I, 320 (1789). 



U. pendula Willd. Berl. Baumz. 519 (1796). 



JJ. alba Raf. FI. Lud. 115 (1817). 



v. americana var. scabra Spach, Ann. Sci. Nat 2 ser. XV, 364 

 <1841). 



U. americana var. bartramii Walp. Ann. Ill, 424 (1846?). 



U. floridana Chap. Fl. S. St. 416 (1860). 



U. americana var. aspera Chap. Fl. S. St. 416 (1860). 

 Wats, and Coult., Gray's Man. 6 ed. 462; Britt., Fl. N. J. 216; Webb., FL 

 Neb. Ill; Upham, Fl. Minn. 124; Mac, Fl. Can. I. 428; Coult., Fl. Colo. 329: 

 Cov., Fl. Ark. 218; Engl., Nat. Pflanz. Ill, 1, 62. 



North America: Cape Breton, N. S.,N, Br., Q., Ont., 

 L. Winnipeg to 52° N. lat. on Saskatchewan and L. Waswan- 

 apy, N. W. T.; S. to N. Eng., N. J. and Fla. and W. to Kan., 

 Neb. , Dak. , Ark. and head waters of Missouri river. 



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