TABLE OF CONTENTS. 
On the leaf and sporocarp of Pilularia (with plates I-Il), Duncan S. Johnson 
Conditions for the germination of the spores of vere and pteridophytes 
(wi 
h plate iv), : Fred De Forest Heald 
A comparative saad of the development of of some anthracnoses (with plates ¥u— 
Xvi), . Bertha Stoneman 
On the relation of the flora of the Lower Sonoran zone in North America to the . 
flora of the arid zones of Chili and Argentine, - liam L. Bray 
The origin of gymnosperms and the seed habit, - - . John M. Coulter 
A study of regeneration as exhibited by mosses (with plates xIx and x 
fred De pice Heald 
Karyokinesis in the root tips of Allium Cepa (with plates xx1 and xx), 
John H. Schaffner 
Cell division in pine seedlings (with plates xxl and xxiv), Edward L. Fullmer 
Popular American plant-names. V and Vi--- ~ - Fannie D. Bergen 
Observations upon the newer botany, - - - : Byron D. Halsted 
The comparative morphology of the pistils of the Ranunculacex, LRP 
and Rosacez (with plate xxv), - - Ernst A. Bessey 
The embryology of Alyssum (with plates erat Lumina Cotton Riddle 
Further observations on the eastern acaulescent violets, Charles Louis Pollard 
A new self-registering transpiration machine, - dwin Bingham Copeland 
The effect of aqueous solutions on the germination of fungus spores, 
fF. L. Stevens 
The physiological action of certain plasmolyzing agents, - Rodney H. True 
The early botanical views of Prunus domestica, - - f. A. Waugh 
BRIEFER ARTICLES— 
Notes on the genus Bartonia, - - - - +. BL. Robinson 
Notes on sundry American plums, - ~ 9+ A. Waugh 
Two noteworthy oaks (with plates v and oe oe Ba Mee 
The southern maidenhair fern in the Black Hills of South Dakota, 
harles £. Bessey 
Bacterial content of hailstones, - s - F.C. Harrison 
Notes and new species of the genus bp (with figures), 
Charles F. Millspaugh 
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