TABLE OF CONTENTS 
The origin and taxonomic value of the veil in 
ictyophora and Ithyphallus (with pistes 
I-VII and one figure) - Geo. F. Atkinson 
The affinities of Geinitzia eracilima vith late 
Vill - Edward C. Jeffrey 
Studies on the scintion of the bas sae to the 
transpiration and sap-flow in CHEM, I 
(with one figure)  - - James Bertram Overton 
The anatomy of the Soe dae of M arattia alata. 
Contributions from the Hull Botanical Labora- 
tory 142 (with plates IX-XII and three 
gures) . - Grace Miriam Charles 
Studies on the pb Gen of the iiviiig sie to the 
transpiration and sap-flow in ew. I 
(with two figures) - - James Bertram Overton 
Reduction by roots” - ld Schreiner and M. X. Sullivan 
Studies on the phloem of the cto (with 
plate XIII) - - Ansel F. Hemenway 
Oenothera Lamarckiana: its carly ‘slivers and 
description - E. J. Hill 
The causes of veRetative Be Coneitations 
from the Hull Botanical Laboratory 1 143 - Henry C. Cowles 
Studies on Jamaican Pymensplyliageae (with . 
eight figures) - Forrest Shreve 
A wax seal method for Seecmining the ‘iow limit 
of available soil moisture (with two ener 
Lyman J. Briggs and H. L. Shantz 
The ae ee ee of the duration of life of 
arley grai - - T. Harper Goodspeed 
Alterations in herelity dace by Sang treat- 
ments (with ht XIV-XVI and three 
figures D. T. MacDougal 
Some features of the eae of the foliar ‘niles 
(with plate XVII) - - Edmund W. Sinnott 
Concurrent oxidation and shits. — roots 
Oswald Schreiner and M. X. iy ta 
The desert lichens of Reno, Nevada - ~ Albert W. GC. T. Her. 
The mode of chromosome reduction -  - ——— Ruggles os 
Filices Wilsonianae (with two figures) - — - H. Christ 
Two epiphytic algae (with plate XVIII) - - Julia W. Snow 
Vv 
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