TABLE OF CONTENTS. 
On Cretaceous Pityoxyla (with plates I and IT) 
E. C. Jeffrey and M. A. Chrysler 
A study of the vegetation of the mesa region east of 
Pike’s Peak: The Bouteloua formation (with 
map and thirteen figures) - - H. L. Shaniz 16, 
Contributions from the re Movnisin aa 
ium. Aven Nelson 
The nascent forest of the Siiecni fcach sain goes 
tributions to the ecological plant geography of 
the Province of New Brunswick. No. 4 (wit 
fourteen figures) - - - W. F. Ganong 
The development and anatomy of Badavanis pur- 
rea. Contributions from the Botanical Labora- 
tory of the Johns Hopkins eae No. 5 
(with plates IJI-V) -— - Forrest Shreve 
On the importance of physiologically sees sn 
tions for plants - W. J. V. Osterhout 
The mG of the ie sictica Contributions 
m the Hull Botanical Laboratory. L 
Gwith seven figures) -  _- - Heinrich Hasselbring 
Differentiation of sex in thallus ee an 
porophyte (with plate VI and three figures) Albert Francis Blakeslee 
Cobmasiu as a is bari ited, aaa (with 
one figure) - - 
A new fungus of economic i. ra (with. thre 
figures) Ralph E. ae Elizabeth H. Smith 
The development a A ees a hee — six 
ates - George F. Aikinven 
Réle of seed coats in Silas germination, Contrl, 
butions from the Hull Botanical meeouss 
LXXXV (with four figures) William Crocker 
Undescribed plants from Guateinas and othe Cen 
CH. # wate, 
tral American Republics. XXVIII - John Donnell Smith 
g.) Trev. (with four figures) - - - Clayton O. Smith 
tributions from the Hull Botanical Laboratory. 
LXXXVI ioe nine ei and plates XIII-XV) 
Charles J. Chamberlain 
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