TABLE OF CONTENTS 



I. Observations on Egregia menziesii, Francis Ramaley.. 1 



II. Observations on Trichogloea lubrica, Fred. K. Butters 11 



III. Observations on Pelvetia, F. L. Holtz 23 



IV. Petalonema alatum in Minnesota, Daisy S. Hone 47 



V. Observations upon some algae which cause "water 



bloom,"N. P. B. Nelson 51 



VI. Some observations on the staining of the nuclei of 



fresh-water algae, Catherine Hillesheim 57 



VII. Observations on Dictyosphaeria, Caroline M. Crosby.. 61 

 VIII. Stapfia cylindrica in Minnesota, Charles J. Brand.... 71 

 IX. Observations on some calcareous pebbles, Chalmer 



Powell 75 



X. Nitella batrachosperma in Minnesota, Gene Lilley.... 79 



XI. Catalog of Minnesota grasses, W. A. Wheeler 83 



XII. The moss flora of the upper Minnesota river, John M. 



Holzinger 109 



XIII. Two new species of Fontinalis, Jules Cardot 129 



XIV. Outline of the history of leguminous root nodules and 



rhizobia with titles of literature concerning the fixa- 

 tion of free nitrogen b} r plants, III., Albert Schneider 133 

 XV. Report on two collections of Hepaticae from northeast- 

 ern Minnesota, Alexander W. Evans 141 



XVI. Observations on the tide pool vegetation of Port Ren- 

 frew, S. A. Skinner 145 



XVII. Observations on Alaria nana sp. nov., Herman F. 



Schrader 157 



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

 sota. — VII. Lichens of the northern boundary, 



Bruce Fink 167 



XIX. The Umbellales of Minnesota, W. A. Wheeler 237 



XX. The Pteridophytes of Minnesota, Harold L. Lyon.... 245 

 XXI. An addition to the knowledge of the flora of south- 

 eastern Minnesota, C. O. Rosendahl 257 



XXII. A new species of Razoumofskya, C. O. Rosendahl.... ■ 271 



XXIII. The embryogeny of Ginkgo, Harold L. Lyon 275 



XXIV. Observations on Callymenia phyllophora J .Ag., Clara 



K. Leavitt 291 



XXV. Observations on Endocladia muricata (P. and R.) J. 



Ag., Florence M. Warner 297 



XXVI. Observations on Laminaria bullata Kjellm., Olga Muel- 

 ler 303 



XXVII. Minnesota Helvellinese, Daisy S. Hone 309 



XXVIII. Observations on Physalacria inflata (S.) Peck, Jessie 



M. Polley 323 



XXIX. Symbiosis in the genus Lolium, E. M. Freeman 329 



