Geological and Natural History Survey of Minnesota 

 Conway MacMillan, State Botanist 



Minnesota 

 Botanical Studies 



Contents 



XXIX. On the distribution of the North American 



Helvellales, Lucien M. Underwood - - - 483 



XXX. A contribution to the physiology of the root- 

 tubers of Isopyrum biternatum (Raf.) 

 Torr. and Gray, D. T. MacDougal - - - 501 



XXXI. Determinations of plants collected by Dr. J. 

 H. Sandberg, in Northern Minnesota, dur- 

 ing 1891, /. M. Holzinger - - - - - 517 



XXXII. Estimation of the changes in dry weight of 

 leaves of Helianthus, S. Thompson and 

 W. W. Pendergast - - 575 



XXXIII. Some Muscineae of the northern boundary of 



Minnesota, collected by Conway MacMil- 

 lan, during 1895, /. M. Holzinger 579 



XXX IV. Additional extensions of plant ranges, Ed- 



mund P. Sheldon - 583 



XXXV. Notes on the moss flora of Minnesota, /. M. 



Holzinger - 590 



XXXVI. List of fresh-water algae, collected in Minne- 

 sota during 1895, Josephine E. Tilden - - 597 



Bulletin No. 9 



Part 17// - - April SO, 1896 

 With three pi" 



?l 1 N N E A PO IIS, 

 HARRISON <Sc SMI IH. STAT! PR] 



