CONTENTS OF UOL 2, NO. I. 



1 . Observations on Conopholis Americana. By Lucy L. W. 



Wilson, Ph. D., Head of the Biological Department, Phila- 

 delphia Normal School for Girls. (With plates i.-vi.) . ... 3 



2. Recent Observations on Amphicarpaea Honoica. By Ade- 



line F. SCHIVELY, Ph. D., Honorary Fellow in Botany ... 20 



3. Water Storage and Conduction in Senecio Praecox, D. C, 



from riexico. By John W. Harshberger, Ph. D., 

 Instructor in Botany. (With plates vii.-viii.) 31 



4. Structure and Development of Internal Phloem in Qei= 



semium Sempervirens, Ait. By Caroline B. Thomp- 

 son, B. S. (With plate ix.) 41 



5. Structure of the Cork Tissues in Roots of Some Rosaceous 



Genera. By Martha Bunting, Ph. D. (With plate x.) . 54 



6. Comparative Studies on the Rate of Circumnutation of 



some Flowering Plants. By Elizabeth A. Simons . . 66 



Observations on the Development of some Embryo-sacs. 



By Randolph E. B. McKenney, B. S. (With plate xi.) . . 



80 



87 



8. Observations on some Hybrids between Drosera f iliformis 



and D. intermedia. By John M. Macfarlane, D. Sc, 

 Professor of Botany. (With plate xii.) 



9. Statistical Information Concerning the Production of 



Fruits and Seeds in Certain Plants. By John W. 



Harshberger, Ph. D., Instructor in Botany 100 



List of University Publications at the close 

 of this number 



Orders for single numbers or complete sets of the Publications should 



be sent to J. HARTLEY MERRICK, Assistant Secretary, College 



Hall, Station B, University of Pennsylvania, Philadelphia, 



Pa.; or to Ginn and Co., Agents, Tremont 



Place, Boston, .Mass. 



