TABLE OF CONTENTS. 



PAGE 



The Uredineae occurring upon Phragmites, Spartina, and 



Arundinaria in America (with four figures) 



Contributions from the Rocky mountain herbarium. Ill and 



IV 



Three new genera of the higher fungi (with three figures) - 



Notes on the phylogeny of Liriodendron (with one figure) • 



The electrical coi.ductivity of plant juices (with two figures) 



On the nature of the stimulus causing the change of form and 



structure in Proserpinaca palusfHs. Contributions 

 from the Hull Botanical Laboratory. XXXVII (with 

 ten figures) .----.-- 



Contributions to the biology of Rhizobia. I. Rhizobiu^n 



imitabile in artificial culture media (with plate i) 



Notes on certain species of Antennaria - - - , 



A survey of the Huron river valley. I. The ecology of a 



glacial lake. Contributions from the Botanical Lab- 

 oratory of the University of Michigan. LXIV (with 

 four figures) 



The rise of the transpiration stream : An historical and criti- 

 cal discussion. Contributions from the Hull Botanical 



/. C Arthur 



Aven Nelson 21, 355 



6^. F, Atkinson 36 



E. W, Berry 44 



F, D. Heald 81 



W. B, MacCallum Q3 



Albert Sch neider I og 

 Elias Nelson 1 1 4 



Howard S, Reed 125 



Laboratory. XXXVIII (with one figure) - 

 A revision of the genus Nemophila (with plates li-v) 



The evolution of the vascular tissue of plants (with seven 



figures) - - - - 



A morphological study of Thuja. Contributions from the 



Hull Botanical Laboratory. XXXIX (with plates 

 vi-vai) - - _ 



Some notes on the ecology of the Delaware coast. Contri- 

 butions from the Hull Botanical Laboratory. XL 

 (with map and ten figures) _ - - - . 



- E. B. Copeland 161,260 



H. P. Chandler 194 



W,aWorsdell 2!6 



W. J. G. Land 249 



Laetitia M, Snow 284 



On the development of certain Piperaceae (with plates JX-x) Duncan S. Johnson 321 



The structure of the starch grain (with plate XI and text 



figures) Henry Kraemer 34 1 



A morphological study of certain Asclepiadaceae. Contribu- 

 tions from the Hull Botanical Laboratory, XLI - T. C. Frye 389 



The root-hairs, cap, and sheath of Azolla (with plate xvi) - R, G, Leavitt 414 



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