vi CONTENTS [VOLUME LX 
basta anatomy of the megasporophylls of 
ifers. Contributions from the Hu 
Butaricat Laboratory 208 (with 196 figures) - Hannah C. Aase 
The index of foliar transpiring power as an indicator 
of permanent lat ga in pee ey one 
figure) - - - A. L. Bakke’ 
Oenothera gigas nanella, a Mendelian mutant . Hugo DeVries 
The influence of the tannin content of the host 
plant on Endothia ce and _ related 
specie es - - - - Melville T. Cook and Guy W. Wilson 
Studies of Diospyros Kaki. 1. Contributions 
from the Hull Botanical Laboratory 209 
(with plates XII and XIII and eleven figures) Kono Yasui 
New and noteworthy ap from southwestern 
Colorado - - Edwin Payson 
Morphology of the Lemna frond vith plate XIV 
and one figure) - . - Frederick H. Blodgett 
Notes on North American willows. III - . Carleton R. Ball 
On - occurrence and significance of “bars” or 
rims’’ of Sanio in the cycads (with “ XV) H. B. Sifton 
The distribution of beach plants - - - Edith A. Roberts 
Mass mutation in Oenothera ony — fifteen 
figures)- — - Harley Harris Bartlett 
Fertilization in Abies balsamea. Contributions 
from the Hull Botanical Laboratory 210 
(with plates XVI-XX and one figure) - - A. H. Hutchinson 
sea size of kelps on the Pacific coast of North 
America (with two figures) 
_ T.C. Frye, G. B. Rigg, and W. C. Crandall 
New species of Achlya and of Saprolegnia (with 
plate XXI) - eg Oe A. J. Pieters 
BRIEFER ARTICLES— 
Charles Edwin Bessey (with portrait) - - - John M. Coulter 
The relative importance of different species in a 
mountain grasslan - - Francis Ramaley 
Tissue tension in Amorphophallus (with, one bens) Frank C. Gates 
A tropism chamber (with three figures) - W. T. Bovie 
The influence of ether on the growth of Endothia - 
Melville T. Cook and Guy W. Wilson 
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