TABLE OF CONTENTS. 



I. Contributions to a knowledge of the lichens of Min- 

 nesota. — III. The rock lichens of Taylors Falls, 

 Brtcce Fink ....... \ 



II. A method of determining the abundance of second- 

 ary species, Roscoe Potitid and Frederic E. 

 Clements . . . . . . . • ^9 



III, List of fresh-water algai collected in Minnesota dur- 



ing 1S96 and iScf'j, J^osep/iine E. Tilden . . 25 



IV. Corrections and additions to the flora of Minnesota, 



A. A. Heller 30 



V. New and interesting species from New Mexico, A. 



A. Heller 33 



VI. Some jSIusci of the International Boundary, Joh7i 



M. Holzi?iger . . . . . . -36 



VII. The influence of gases and vapors on the growth of 



plants, Eiiiil P. SaJtdsten . . . -53 



VIII. Seedlings of certain woody plants, Francis Ramaley 69 

 IX. Comparative anatomy of hypocot}'! and epicotyl in 



woody plants, Francis Ramaley . . • S7 



X. Contribution to the life-history of Rumex, Bruce 



Fink ........ 137 



XI. Observations on Gigartina, Mary E. Olson . '154 



XII. Seed dissemination and distribution of Razoumofskya 



robusta (Engelm.) Kuntze, D. T. MacDougal . 169 



XIII. Observations on Constaritinea, E. J/. Freeman . 175 



XIV. Extension of plant ranges in the upper Minnesota 



valley, L. R. Moyer ...... 191 



XV. List of HepaticcE collected along the international 

 boundary by J. M. Holzinger, 1S97, Alexander 

 W. Evans . . . . . . -193 



XVI. Obser^■ations on Chlorochytrium, E. M. Freeman. 195 

 XVII. Observations on Rhodymenia, Frederic K. Butters. 205 

 XVIII. Contributions to a knowledge of the lichens of Min- 

 nesota. — IV. Lichens of the Lake Superior re- 

 gion, Brnce Fifik . . . . . •215 



XIX. Contributions to a knowledge of the lichens of Min- 

 nesota. — V. Lichens of the Minpesota valley and 

 southwestern Minnesota, Bruce Fink . . 277 



V 



