CORRECTIONS. 



Page 7. For Hypericum kalmianum read Potentilla fruticosa. The 

 two grow together on the prairie but the latteris more abundant 

 and to it belong the small petrified leaves collected. 



Page 28. The four names at the top of first column should be at the 

 bottom. 



Page 50. For P. annual read P. annua. 



Page 54. For hedunculata read pedunculata. 



Page 63. For J. ten vis read J. tenuis. 



Page 76. Place a mark of doubt — ? — after occurs, at end of third 

 line. 



Page 84. For AMONACE/E read ANONACE/E. 



Page 94. For SAXIFRAGAC/E read SAXIFRAGACE/E. 



Page 150. For T. pratensis read T. pratensis. 



