vi CONTENTS [VOLUME xL 
PAGE 
The ae coats of Selaginella. Contributions from = 
e Hull Botanical east LXXX pes 
me Xand XI) - Florence Lyon 285 
Contributions to the biology of rhizobia. V_ - - Albert Schneider 206 
Studies of pices in — — twenty-seven 
figures) - orge J. Peirce and Flora A. Randolph 321 
The bogs and bog flora of the Huron River Valley 
(with sixteen figures) - - Edgar Nelson Transeau 351, 418 
Life history of Hypocrea alutacea - - - George F. Atkinson 401 
BRIEFER ARTICLES— : 
The Vienna Congress - - C. R. Barnes 68 
Another seed-like characteristic of Slant - Florence Lyon 73 
The vitality of seeds - - - - W.J. Beal 140 
Some Mexican — of Cracca, Parosela, and 
Meibomia_~ - - J. N. Rose and Jos. H. Painter 143 
A new Krynitzkia = - - - - - - J. M. Greenman 146 
Precursory leaf serrations of Ulmus (with two 
figures) - - . ae ne . Frederick H. Billings 224 
The effect of different soils on the ce ae . 
of the carnation rust - - - John L. Sheldon 225 
The physiological constants of plants commonly 
used in American botanical laboratories. I - Sophia Eckerson 302 
Further observations on the structure of the starch 
grain - - Henry Kraemer 305 
Notes on North American willows. I with 
plates XII and XIII) - - Carleton R. Ball 376 
Tolerance of drought by Neapolitan cliff flora 
(with three figures) - J.Y.-Bergen 449 
A new genus of Ophioglossaceae (with one 
H. L. Lyon 455 
CURRENT LITERATURE - .-. ~..-. (+... ~ dy 148 230, 323, 381, 459 
For titles of books reviewed see index under | 
author’s name and Reviews. 
Papers noticed in ‘‘Notes for Students” are 
indexed under author’s name and subjects 
NEWS - - - - - - 80, 160, 240, 320, 399, 479 
DATES OF PUBLICATION. 
No. 1, July 18; No. 2, August 16; No. 3, September 15; No. 4, October 18; 
No. 5, November 15; No. 6, December 20. 
