Wheeler : FLORA OF SOUTHEASTERN MINNESOTA. 409 
CICHORIACEZ. 
Cichorium intybus L. Sp. Pl. 813. 1753. 
Coll.: Wheeler 594, Lyon 468, Crooked Creek. Aug. 
Adopogon virginicum (L.) Kunrze, Rev. Gen. Pl. 304. 1891. 
Coll.: Lyon 20, 337, Wheeler 506, Winnebago. June, 
Aug. 
Taraxacum taraxacum (L.) Karst. Deutsch. Fl. 1138. 1880 
83. 
Coll.: Lyon 121, Winnebago. June. 
Sonchus asper (L.) Aux. Fl. Ped. 1: 222. 1785. 
Coll. : Lyon 264, Jefferson. July. 
Lactuca scariola L. Sp. Pl. Ed. 2, 1119. 1763. 
Coll.: Lyon 374, Jefferson. Aug. 
Lactuca ludoviciana (NutT.) DC. Prodr. '7: 141. 1838. 
Coll.: Lyon 285, 445, 447, Jefferson. July. 
Previously reported only by Sheldon from Sleepy Eye. 
Lactuca sagittifolia ELL. Bot. S. C. & Ga. 2: 253. 1821-24. 
@oll: ioyon 363, Jefterson. Aug. 
Previously reported only by Sheldon from Lake Benton. 
Lactuca floridana (L.) GaERTN. Fruct. & Sem. 2: 362. 1791. 
Coll.: Lyon 334, 410, 423, Winnebago. Aug. 
Hieracium umbellatum L. Sp. Pl. 804. 1753. 
Coll.: Wheeler 627, Brownsville. Aug. 
No authentic specimens previously reported from Minnesota. 
Hieracium canadense Micnx. Fl. Bor. Am. 2: 86. 1803. 
Coll.: Wheeler 443, Jefferson; Lyon 311, 341, Wheeler 
510, Winnebago. Aug. 
Hieracium scabrum Micnx. F]. Bor. Am. 2: 86. 1803. 
Coll’; Wheeler 485, Lyon 336, 405,' 462, ‘Jefferson; 
Wheeler 513, Winnebago; Wheeler 636, Brownsville. 
Nabalus albus (L.) Hook. Fl. Bor. Am. 1: 294. 1833. 
Coll.: Wheeler 521, Winnebago. Aug. 
AMBROSIACEZ. 
Ambrosia trifida L. Sp. Pl. 987. 1753. 
Coll.: Wheeler 417, Jefferson. July. 
Ambrosia artemisiefolia L. Sp. Pl. 987. 1753. 
Coll. : Lyon 495, Jefferson. Aug. 
Xanthium canadense Mixu. Gard. Dict. Ed. 8, No. 2. 1768. 
Coll.: Lyon 424, Winnebago. Aug. 
