TABLE OF CONTENTS 
A study of reduction in Oenothera rubrinervis. Con- 
tributions from the Hull Botanical oS 
CXI (with plates I-III) - - Reginald Ruggles Gates 
Studies in Araceae (with plates IV-V) - - - James Ellis Gow 
The embryo sac and embryo of Gnetum : 
Contributions from the Hull Botanical Labora- 
tory CXII (with plate VII) Biases John M. Coulter 
Floral succession in the prairie-grass Ssnihiision in 
southeastern South Dakota. | Contributions 
from the Hull ee ti ai CXiIr 
(with three figures) - - LeRoy Harris Harvey 
Undescribed plants from Gannenale and other Cen- 
tral American republics. XXX -  -'John Donnell Smith 
A method for the quantitative ieceeatoniion of tran- 
spiration in plants (with one figure) - Geo. F. Freeman 
oe: toxic property of bog water and bog soil wth 
: Alfred Dachnowski 
The andaais cone and ee sananiptigts of Podo- 
carpus. Contributions from the Hull Botanical 
Laboratory CXIV sos nine or and wer 
VII and I L. Lancelot Burlingame 
Sisyrinchium: snabiaical ee of North American 
species (with plates X, XI, ge Theo. Holm 
A new respiration calorimeter - - George J. Peirce 
The seedling of Ceratozamia. Contributions: from 
the Hull Botanical Laboratory nes (with two 
figures and plates XII—XVI) Helen A. Dorety 
Are there foliar gaps in the Lyeopsida? vith plates 
XVII and XVIII) Edward C. Jeffrey 
Effect of illuminating gas ‘mod pees upon en 
carations. Contributions from the Hull 
Botanical Laboratory CXVI (with four figures) 
William Crocker and Lee I. Knight 
Floral succession in the prairie-grass formation of 
southeastern South Dakota. Contributions from 
the Hull Botanical egmeames! CXVII (with 
four figures) - LeRoy Harris Harvey 
Observations on Poppers olds toa and some 
of its allies from Europe and North America 
(with five figures and plate XIX) - -  ~- George F. Atkinson 
The morphology of Phyllocladus alpinus. Contribu- 
tions from the Hull Botanical esanigpend 
CXVIII (with plates XX—XXIT) - N. Johanna Kildahl 
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