974 



COMPOSITAE 



Helianthus 



5o 

 Map 2126 



Helianthus petiolans Nutt. 



50 



Map 2127 



Helianthus annuus L. 



" '"' 



Map 2128 



Helianthus occidental i s Riddel 



1. Helianthus angustifolius L. Map 2125. In 1931 in Pike County I 

 found this species rather common over an area of about three acres in a 

 large creek-bottom pasture field. I noted that the cattle did not eat it. I 

 found it also in a low pasture field in Jefferson County. Doubtless it has 

 been introduced although the field in Pike County is far removed from a 

 railroad and it is the second field back from a little used road. No doubt it 

 came in through grass seed. I introduced it in our garden which has 

 neutral soil. It gradually died out in four years. Doubtless it requires 

 a slightly acid soil, the kind in which I found it. 



N. J. to Mo., southw. to Fla. and Tex. 



2. Helianthus petiolaris Nutt. Map 2126. This species probably has 

 just begun to invade the state. It was first reported in 1900. I began to 

 botanize the dune area in 1905 but I did not find it until 1925. It grows in 

 very sandy soil and within the area of its distribution in the state where 

 the sand has been disturbed it has become an abundant weed in cities and 

 along roads and railroads. 



Man. to Tex., westw. to Calif. ; introduced eastw. 



3. Helianthus annuus L. Common Sunflower. Map 2127. This 

 species has been cultivated more or less for many years in all parts of the 

 state and there are reports of its escape from all parts of the state. I doubt 

 whether it is a native of the state although in 1922 I found it to be a 

 common weed along a sandy roadside and in an adjoining sandy, fallow 

 field about 2 miles northeast of Jacksonville, Vermillion County. The 

 plants were comparatively small, mostly from four to six feet high. 

 Phinney in 1883 reported it as common in the prairies in Delaware County 

 but most authors report it as an escape. 



Minn, to Tex. and westw. ; becoming introduced eastw. 



4. Helianthus occidentalis Riddell. (Helianthus illinoensis Gleason.) 

 Map 2128. This species is local but not rare in the lake area. It is always 

 found in very sandy soil and usually in moist places such as low depres- 



