234 UNIVERSITY OF MISSOURI STUDIES [37*5 



996. R. pallida Nutt. \_B. pallida (Nutt.) Britton], Pale 



PURPLE CONE-FLOWER. 



Rare on the bluffs of Grindstone creek. 

 Michigan to South Dakota and Missouri; Alabama to 

 Texas. 



997. R. pinnata Vent. [Z.//;««^/^ (Vent.) T. & G.: Rati- 

 bida pinnata (Vent.) Barnh.]. Gray-headed cone- 

 flower. 



Common in dry thickets and wild rocky fields. 

 New York and Michigan to Minnesota and South Dako- 

 ta; Florida to Texas. 



998. R. Tagetes James \L. Tagetes (James) Gray: Ratibida 

 Tagetes (James) Barnh.]. Short-rayed cone-flower. 



Waste grounds near the Missouri, Kansas and Texas rail- 

 road. 



Missouri to Kansas; Arkansas to Arizona and New 

 Mexico. 



410. HELIANTHUS L. Sunflower. 



999. H. annuus L. Common sunflower. 

 Common in yards and waste places. 



Minnesota to Saskatchewan; Missouri to Texas and 

 Mexico; adventitious eastward. 



1000. H. hirsutus Raf. Harsh-leaved sunflower. 

 Very common in dry thickets and roadsides. Some forms 



approach closely H. divaricatus L., but the leaves are petio- 

 late. 



Pennsylvania to Michigan and Wisconsin; Georgia to 

 Texas. 



loooa. H. hirsutus trachyphyllus T. & G. 

 Frequent in rich thickets. 

 Arkansas and Missouri to Nebraska. 



looi. H. strumosus L. Wood sunflower. 

 Oak woods and banks; variable. 

 Maine to Ontario and Minnesota; Georgia to Arkansas. 



