414 MINNESOTA BOTANICAL STUDIES. 
Bidens levis (L.) B.S.P. Prel. Cat. N. Y. 29. 1888. 
Coll.: Wheeler 560, Jefferson. Aug. 
Bidens comosa (A. Gray) Wirecanp, Bull. Torr. Club, 24: 
W260. VL OO vc 
Coll. : Wheeler 544, 559, Jefferson ; 628, Brownsville. Aug. 
Not previously reported from Minnesota. The only pre- 
viously collected authentic specimen seen from Minnesota 
is that of Aiton, Minneapolis, Sept., 1890. 
Common on the low wet ground throughout. 
Bidens frondosa L. Sp. Pl. 832. 1753. 
Coll.: Wheeler 541, Jefferson. Aug. 
Helenium autumnale L. Sp. Pl. 886. 1753. 
Coll.: Wheeler 487, Jefferson. Aug. 
Achillea millefolium L. Sp. Pl. 899. 1753. 
Coll.: Wheeler 398, Jefferson. July. 
Anthemis cotula L. Sp. Pl. 894. 1753. 
Coll.: Lyon 269, 284, Jefferson. July. 
Chrysanthemum leucanthemum L. Sp. Pl. 888. 1753. 
Coll Lyon-23, Crooked Creek, July. 
Tanacetum vulgare L. Sp. Pl. 844. 1753. 
Coll.: Lyon 416, Winnebago. Aug. 
Artemisia dracunculoides Pursu, Fl. Am. Sept. 742. 1814. 
Coll.:. Wheeler 370, Crooked Creek; Lyon 369, 390, 
Jefferson. Aug. 
Artemisia serrata Nutr. Gen. 2: 142. 1818. 
Coll.: Lyon 383, Jefferson. Aug. 
Artemisia gnaphalodes Nutr. Gen. 2: 143. 1818. 
Coll.: Wheeler 550, Jefferson; Lyon 419, Winnebago. 
Aug. : 
Erechtites hieracifolia (L.) Rar. DC. Prodr. 6: 294. 1837. 
Coll.: Lyon 342, 446, Jefferson; Wheeler 621, Browns- 
wille. AtrS:. 
Mesadenia reniformis (Munu.) Rar. New Fl. 4: 79. 1836. 
Coll: Wheeler'273, (Crooked Creek. june: 
Senecio plattensis Nutt. Trans. Am. Phil. Soc. (II.) 7: 473. 
1841. 
Coll.: Wheeler 100, Winnebago. June. 
Not previously reported from Minnesota. The only previous 
known collection in this state is that of Prof. Conway 
MacMillan from Hennepin county. 
