976 



COMPOSITAE 



Helianthus 



50 



Map 2132 



Helianthus mollis Lam 



50 



Map 2133 



Helianthus doronicoides Lan 



found together. Its habitat is a dry or sandy wooded slope, and it is usually 

 associated with black and white oak. It was reported from Porter County 

 by Peattie but I have not seen a verifying specimen. 

 Pa., Ind. to Mo., southw. to Fla. and Miss. 



7. Helianthus divaricatus L. Map 2131. This is one of the most common 

 of our sunflowers. It is usually rather frequent on the crests and slopes of 

 white oak and white and black oak ridges and in the sun along roadsides 

 and fences. It is rarely found in moist rich soil except in the prairies. 



Maine to Lake Winnipeg, southw. to Fla. and La. 



8. Helianthus mollis Lam. Ashy Sunflower. Map 2132. This sun- 

 flower is generally found in black sandy soil in prairie habitats but is 

 sometimes found in moist, hard, white clay soil in the Illinoian drift area. 

 It is rather frequent in the northwestern counties and along the western 

 part of the state, becoming very rare or absent in the central counties and 

 local in the southern counties. Doubtless it prefers a slightly acid soil 

 because it soon dies out when transferred to a neutral soil. 



Mass. to Iowa, southw. to Ga. and Tex. 



9. Helianthus doronicoides Lam. Map 2133. Doubtless this is one of our 

 rarest sunflowers. In 1930 I found a colony in an old woods pasture in 

 Marshall County and Miss Madge McKee found it in a prairie habitat 

 along the railroad near Goodland, Newton County. There are a few 

 reports of it from the state but the species of sunflowers were not well 

 understood by our earlier authors so that it is best not to rely upon them. 

 I transplanted the specimen I found and it is still growing vigorously. 

 Watson, who visited me, said it was the first wild specimen he had ever 

 seen and writes that it is rare. 



N. J. to Mo. 



10. Helianthus grosseserratus Martens. SAWTOOTH SUNFLOWER. Map 

 2134. This sunflower prefers the moist, black, sandy soil of prairie habitats 

 and is frequent in them in the western part of the state. It grows also in 



