vi CONTENTS 
A new fruit rot of tomatoes (with plate VII) -_- 
Effect of seeds upon hydrogen-ion concentration of 
solutions- - - - - <= Se 
Physiological studies of effects of = was kobe on 
wheat (with twelve figures) - 
Development of the Geoglossaceae (with plates 
Vitbes el) Se ee ee eee 
A morphological study of the Umbelliferae. Con- 
tributions from the Hull Botanical Labora — 
298 (with plates XIII, XIV) - 
Determination of moisture content of — 
plant tissue fluids - 
Moisture content of peach buds in relation to 
temperature evaluations (with two figures) - 
Alternaria from California (with two figures) -  - 
Basisporium gallarum Moll., a Pe of the 
tomato (with eleven figures)  - 
Ecological factors in region of Starved Rock, Illinois. 
Contributions from the Hull Botanical Labora- 
tory 299 (with five figures)- - - - - 
Notes on neotropical ant-plants. I. Cecropia 
angulata, sp. nov. (with plate XV and eight 
guts) ~ 9 < +. we oe oe ee 
’ Prothallia of Lycopodium in America. II. L. lu- 
cidulum and L. obscurum var. dendroideum. 
Contributions from the Hull Botanical Labora- 
tory 300 (with plates XVI-XVIII) - - - 
New South American Asteraceae collected Be 
E. W. D. Holway (with plate XIX)- - 
Recent studies of iar tage and their of mae 
on classification 
A method for estimating hydrophilic colloid content 
of expressed plant tissue fluids (with one 
qe) - = Get see 
Growth of plants in artificial light (with two 
fparess = ee ee ee 
[VOLUME LXXIV 
R. Frank Poole 
W. Rudolfs 
W. M. Atwood 
G. H. Duff 
H. S. Jurica 
R. A. Goriner and 
W. F. Hoffman 
Earl S. Johnston 
D. G. Milbraith 
G. B. Ramsey 
Frank Thone 
I. W. Bailey 
E. A. Spessard 
S. F. Blake 
Wm. R. Taylor 
R. Newton and 
R. A. Gortner 
R. B. Harvey 
210 
