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WEED FLORA OP IOWA 

 Ox-eye {Heliopsis scabra Dunal.)- 



Description.— A rough, pubescent, perennial with opposite, 

 petioled, triple-nerved leaves; heads large, peduneled; scales of 

 involucre in 2-3 rows, nearly equal; ray flowers yellow, 10 or 

 more, fertile; achenes smooth, thick, 4-angled, tnmcate; pappus 

 chaffy or 2-3-toothed. 



Distribution. — ^From New York west to Wisconsin, Minnesota 

 and British Columbia and southwest to Missouri, Kansas and 

 Arkansas. 



Extermination. — Though this weed is perennial, it is rather 

 easily destroyed by cultivation. 



I''ii.' 196. Ox-eye (Heliopsis scabra). a, plant hair or trichome. Common in 

 orchards, waste places. Ratl:er large yellow heads, and rough, oppositii 

 leaves. 



(Photograph by Colburn. a, drawing by Charlotte M. King.) 



