100 THE AMERICAN MIDLAND NATURALIST. 
Sonchus oleraceus \. 
Streets. Occasional. The name ‘‘Common sow-thistle’’ ordi- 
narily applied would be both inappropriate and misleading for this 
locality. 
Sonchus asper (1,.) Hill. SING SOW THISTLE. 
Streets, gardens and lawns. Common. July 5. 
Lactuca scariola \. PRICKLY LETTUCE. 
Streets and waste ground. Frequent. Not definitely known 
previous to 1918. The var. (?) integrata Gren. & Goodr., common. 
July 15 (15). 
Lactuca ludoviciana (Nutt.) D C. WESTERN WILD LETTUCE. 
Prairie and roadsides. Frequent. July 5. 
Lactuca canadensis I,. WILD LETTUCE. 
Woods. Frequent. June 30. 
Lactuca pulchella (Pursh) DC. BLUE WILD LETTUCE. 
Fields, roadsides, prairie. Common. July 5 (3). 
Lactuca spicata (1am.) Hitch. TALL BLUE LETTUCE. 
Woods. Frequent. 
Agoseris glauca (Pursh) Greene. FALSE DANDELION. 
Prairie. Becoming rather infrequent. June to. 
Crepis tectorum I,. HAWK’S BEARD. 
CoH. Waldron in 791s: 
Crepis capillaris (1,.) Wallr. 
Stevens in 1918 (lawn). 
Hieracium scabriusculum Schwein. HAWKWEED. 
Woods. Occasional. 
Nabalus albus (1,.) Hook. WHITE LETTUCE. 
Woods. Frequent at least in or near aspen on Minnesota side. 
Ae. 15. 
Nabulus racemosus (Michx) DC. _ 
Prairie. Stevens in 1920; not previously reported but quite 
common in that particular place. Aug. 25. 
Alismaceae, Water Plantain Family. 
Alisma plantago-aquatica \,. WATER PLANTAIN. 
Sloughs, low fields and pond margins. Common. June 25. 
Sagittaria arifolia Nutt. ARROW-HEAD. 
River and pond margins. Common. June 20. 
O. A. STEVENS, 
North Dakota Agricultural College. 
