Wheeler: FLORA OF SOUTHEASTERN MINNESOTA. 381 
Salix fluviatilis Nutr. Sylva, 1: 73. 1842. 
Coll.: Wheeler 136, Winnebago; 333, Crooked Creek. 
June, July. 
Salix bebbiana Sarc. Gard. & For. 8: 463. 1895. 
Coll.: Wheeler 343, Crooked Creek. July. 
Salix humilis Marsu, Arb. Am. 140. 1785. 
Coll.: Wheeler 181, Winnebago. June. 
Salix discolor Muni. Neue Schrift. Ges. Nat. Fr. Berlin, 4: 
224. Dl, 0. fe I. TOR. 
Coll.: Wheeler 138, Winnebago; 334, Crooked Creek. 
jae, July. 
BETULACEZ. 
Carpinus caroliniana WALT. Fl. Car. 236. 1788. 
Coll.: Lyon 56, Winnebago. June. 
Ostrya virginiana (Mriu.) WiLup. Sp. Pl. 4: 469. 1805. 
Coll.: Wheeler 200, Winnebago. June. 
Corylus americana Watt. Fl. Car. 236. 1788. 
Coll.: Wheeler 22, Winnebago. June. 
Corylus rostrata Arr. Hort. Kew. 3: 364. 1789. 
Coll.: Wheeler 223, Winnebago; 275, Crooked Creek. 
June. 
Not previously collected from southern part of state. Local 
on bluffs. 
Betula papyrifera Marsu. Art. Am. 19. 1785. 
Coll..>, Wheeler 215, Jefferson. June. 
Common, dry ridges. (Plates XXIII., A and XXIV., B.) 
Betula nigra L. Sp. Pl. 982. 1753. 
Sole: Wheelers552; jefferson: Aug. 
Common in the lowlands of the Mississippi River. 
Betula lenta L. Sp. Pl. 983. 1753. 
Coll.: Wheeler 165, Winnebago. June. 
Not previously collected in the southern part of the state. 
Rare. 
merola lutea Micux. f. Arb. Am. 2: 153.27. 5. (1812: 
Coll.: Wheeler 199, Winnebago; 271, Crooked Creek; 
325, Mayville. June, July. 
Frequent in moist locations along Winnebago and Crooked 
creeks. 
