IOWA ACADEMY OF SCIENCES. 237 



tipped with a soft bristle, inner long acuminate, narrow lanceolate 

 ending withanerose appendage. 



Distribution, Iowa. — Ames, Ball, Combs. Gilbert Sta- 

 tion, G. W. Carver. Ontario, E. R. Hodson. Dubuque, L. 

 H. Pammel. Muscatine, Ferd. Reppert. Ames, Hitchcock, 

 S. U. I. Mason City, B. Shimek. Des Moines, Pammel. 

 North English, W. D. Fitz water. 



The specimens collected by A. S. Hitchcock at Ames 

 have large heads and large flow^ers with the scarious erose 

 bracts and acuminate anther tips. The basal outer bracts 

 are very large. And in its genaral characters resembles 

 specimens collected by Mead in Hlinois and Westchester, 

 Darlington and Trelease at Ithaca, N. Y., and by Engel- 

 mann in the American bottoms opposite St. Louis. 



After an examination of a considerable amount of 

 material I find that there is a great deal of morpho- 

 logical variability in Cniciis Hillii and C. odoratvs. The 

 Cnicus Hillii seems to be quite variable, which is evidenced 

 by the careful drawings of Messrs. Barnes, Reppert, and 

 Miller. But in their figures the inner bracts are simply 

 long acuminate. All the Muscatine specimens that I have 

 examined reveal the fact that the inner bracts are not 

 only long acuminate, but are erose; this seems to be true 

 of all the specimens of this species which I have exam- 

 ined. It is a good character. A specimen collected by 

 William Boot in Cambridge, Mass., and preserved in the 

 Gray Herbarium, is typical of C. odoraiiis; this has the 

 appendages long acuminate, but not erose. It is possible, 

 of course, that the C. odoratus may reach the state of 

 Iowa, but it is doubtful. It seems to be an Atlantic coast 

 species. 



REFERENCE TO OCCURRENCE IN IOWA. 



Arthur, Contr. Fl. la. 1 : 20. Hitchcock as Cnicus odor- 

 atus, Muhl, Cat. Ant. & Pter., Ames. Barnes, Reppert, and 

 Miller, Fl. Scott and Muscatine Cos. 234, 281, pi. 1-2. 

 Halsled, Prel. List la. Weeds 42. Fitzpatrick, Man. Fl. 

 PI. la. 95. 



