TABLE OF CONTENTS 
The histology of the phloem in certain woody Angiosperms 
(with three text figures and plates XXIV-XXIX) 
L. H. MacDaniels 347 
Cell division by furrowing in Magnolia (with plates XXX-XXXII) 
Clifford H. Farr 379 
No. 8, October 
The cytology of Eocronartium muscicola (with plates XXXIII- 
XXXV) Harry M. Fitzpatrick 397 
Uredinales of Guatemala based on collections of E. W. D. Holway. 
II. Aecidiaceae, exclusive of Puccinia and form-genera 
J. C. Arthur 420 
No. 9, November 
Calcium oxalate in the dasheen O. F. Black 447 
The influence of certain added solids upon the composition and 
efficiency of Knop's nutrient solution 
E. H. Toole and W. E. Tottingham 452 
Uredinales of Guatemala based on collections of E. W. D. Holway. 
III. Puccinia, exclusive of species on Carduaceae 
J. C. Arthur 462 
On the osmotic concentration of the tissue fluids of Phanerogamic 
epiphytes J. Arthur Harris 490 
No. 10, December 
Endurance of extreme conditions and its relation to the theory of 
adaptation (with one text figure). . . .W. J. V. Osterhout 507 
A simple method of demonstrating the production of aldehyde 
by chlorophyll and by aniline dyes in the presence of sunlight 
W. J. V. Osterhout 511 
Oreomyrrhis borneensis Merr. sp. nov., an interesting addition 
to our knowledge of the Malayan flora (with plate XXXVI) 
E. D. Merrill 514 
Root absorption from solutions at minimum concentrations (with 
two text figures) R. B. Harvey and R. H. True 516 
Uredinales of Guatemala based on collections of E. W. D. Holway. 
IV. Puccinia on Carduaceae, form-genera and index 
J. C. Arthur 522 
Index to Volume V 
551 
