FLORA OF THE LEDGES 
lOB 
Matricaria suaveolens (Pursh.) Buchenau. L. H. P., 15. About 
dwelling at head of Pease creek. 
Tanacetnm vulgare L. L. H. P., J. P. A., 13. 
Gacalia tuberosa Nutt. L. H. P., 15. Fields and open spaces. 
Senecio balsamifera Muhl. L. H. P., 15. Hillsides and open 
spaces. 
Arctium minor Bernh. 63, J. V. E., 14; 282, W. W. D., 15. 
Roadsides. 
Cirsium discolor (Muhl.) Spreng. R. E. B., 02. 
Girsium lanceolatum (L.) Hill. L. H. P., 15. Along Pease 
creek. 
Girsium ioense (Pammel) Fernald. L. H. P., 15. In open 
places. 
Taraxacum officinale Weber. 283, W. W. D., 15. Pastures and 
roadsides, common. 
Sonchus oleraceus L. 284, W. W. D., 15. Roadsides and pas- 
tures. 
Lactuca canadensis L. 43, J. V. E., 14. 
Lactuca scariola L. L. H. P., 15. Along Pease creek. 
Lactuca floridana (Lam.) Hitch. 297, W. W. D., 15. Woods, 
frequent. 
Prenanthes alba L. R. E. B., 02; 47, J. V. E., 14; 285, W. W. 
D., 14. Common on wooded hillsides. 
Key to initials used in the Catalogue : 
J. P. A 
J. P. Anderson 
C. R. B. 
. . . . C. R. Ball 
R. E. B 
R. E. Buchanan 
R. H. C. 
R. H. Combs 
W. W. D t 
W. W. Diehl 
J. V. E 
J. Y. Ellis 
C. M. K. 
Miss C. M. King 
R. F. M. 
.R. F. Miller 
L. H. P. 
L. H. Pammel 
Acknowledgment is gratefully made to Dr. L. H. Pammel, 
under whose direction this study was made, for aid and advice 
in the work and for help in 
Thanks are due also to the 
determining many of the plants, 
members of the staff of the De- 
partment of Botany of Iowa State College for many suggestions 
in effecting the work. Acknowledgment is made to Mr. R. I. 
Cratty of Armstrong, Iowa, for determining the various species 
of Carex. 
