IOWA ACADEMY OF SCIENCES. 
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Senecio aureus L. Golden Ragwort. Squaw-weed. Woods; 
frequent. 
8. aureus var. balsamitce Torr. & Gray. Same as above. 
Arctium lappa L. Burdock. Waste places; common; 
introduced. 
Cnicus lanceolatus Hoffm. Common Thistle. Pastures; 
quite common. 
C. altissimus Willd. Rich fields; frequent. 
Troximon cuspidatum Pursh. Prairies; rare. 
Taraxacum officinale Weber. Common Da o delion. Com- 
mon everywhere. 
Lactuca scariola L. Prickly Lettuce. Waste places; not 
common. 
L. acuminata Gray. Woods; rare. 
Sonchus oleraceus L. Common Sow-thistle. Rich ground; 
frequent. 
Lobeliace^e. Lobelia Family. 
Lobelia syphilitica L. Great Lobelia. Low ground; rare. 
L. spicata Lam. High ground; frequent. 
Campanulace^e. Campanula Family. 
Specularia perfoliataLC. Venus’s Looking-glass. Fields 
and woods; quite common. 
Campanula americana L. Tall Bellflower. Woods; 
common. 
Primulace^e. Primrose Family. 
Steironema ciliatum Raf. Woods; frequent. 
Oleace^e. Olive Family. 
Fraxinus americana L. White Ash. Rich woods; frequent. 
F. viridis Michx. f. Green Ash. Border of ponds and 
wet places: common. 
ApocynacetE. Dogbane Family. 
Apocynum androscemifolium L. Spreading Dogbane. Bor- 
der of thickets; common. 
AscLEPiADACEiE. Milkweed Family. 
Asclepias tuberosa L. Butterfly-weed. Pleurisy-root. 
Prairies; common. 
