396 MINNESOTA BOTANICAL STUDIES. 



ACERACE^:. 



Acer saccharinum L. Sp. PI. 1055. 1753. 



Coll.: Lyon 149, Winnebago ; 274, Jefferson. June, 



Acer nigrum MICHX. f. Hist. Arb. Am. 2 : 238. pL 16. 1810. 

 Coll. : Wheeler 149, Winnebago. June. 



Acer spicatum LAM. Encycl. 2: 381. 1786. 



Coll.: Wheeler 163, 198, Winnebago; 319, May ville ; 



625, Brownsville. June, Aug. 

 Frequent on moist shaded cliffs throughout. 



Acer negundo L. Sp. PI. 1056. 1753. 



Coll.: Lyon 119, Winnebago. June. 



BALSAMINACE^E. 



Impatiens aurea MUHL. Cat. 26. 1813. 

 Coll. : Wheeler 328, Mayville. July. 



RHAMNACEJE. 



Ceanothus americanus L. Sp. PL 195. 1753. 



Coll. : Lyon 66, Winnebago ; Wheeler 356, Crooked 

 Creek. June, July. 



Ceanothus ovatus DESF. Hist. Arb. 2 : 381. 1809. 



Coll. : Wheeler 92, Lyon 66^, Winnebago. June. 



VITACEiE. 



Vitis vulpina L. Sp. PL 203. 1753. 



Coll.: Wheeler 139, Winnebago; 344, Crooked Creek. 

 June, July. 



Parthenocissus quinquefolia (L.) PLANCH, in DC. Mon. Phan. 



5: Part 2, 448. 1887. 



Coll.: Wheeler 235, Winnebago; Lyon 379, Jefferson. 

 June, Aug. 



TILIACE^E. 



Tilia americana L. Sp. PL 514. 1753. 

 Coll. : Lyon 211, Mayville. July. 



MALVACEAE. 



Malva rotundifolia L. S p. PL 688. 1753. 

 Coll.: Lyon 491, Jefferson. Aug. 



