TABLE OF CONTENTS V 
The toxicity of bog water George B. Rigg 436 
On the osmotic pressure of the tissue fluids of Jamaican Loran- 
thaceae parasitic on various hosts (with two text figures). 
J. Arthur Harris and John V. Lawrence 438 
Four-lobed spore mother cells in Catharinea (with two text 
figures) Charles E. Allen 456 
The wandering tapetal nuclei of Arisaema (with eight text figures 
and plate XX) F. L. Pickett 461 
Two types of variable pubescence in plants P. L. Ricker 470 
The seaweeds of Hawaii VauGhan MacCaughey 474 
No. 9, November 
Specific action of barium W. J. V. Osterhout 481 
Studies on exosmosis (with four text figures) S. C. Brooks 483 
Effect of environmental conditions upon the number of leaves 
and the character of the inflorescence of tobacco leaves 
(with plates XX-XXHI) H. A. Allard 493 
Oenothera mutants with diminutive chromosomes (with seven 
text figures and plate XXIV) Anne M. Lut2 502 
No. 10, December 
The Uredinales found upon the Onagraceae (with one text figure). 
G. R. BisBY 527 
A study of permeability by the method of tissue tension (with 
three text figures) S. C. Brooks 562 
Osbeck's Dagbok Ofwer en Ostindsk Resa E. D. Merrill 571 
Index to Volume III 589 
(Dates of publication: No. i, Feb. 5 ; No. 2, Mar. 4; No. 3, Apr. 18; 
No. 4, May 8; No. 5, May 26; No. 6, July 17; No. 7, Aug. 11 ; No. 8, 
Oct. 20; No. 9, Dec. 23; No. 10, Jan. 8, 1917.) 
Please insert p. v. in Table of Contents, accompanying December number (Am. 
Journ. Botany 3: No. 10, 1916). 
