vi CONTENTS [VOLUME XXVII 
* PAGE 
A peculiar case of spore distribution (with figure), - - £.L. Stevens 138 
A new Silphium - - - - - a - Wm. M. Canby 139, 319 
A new Colletotrichum disease of the pansy (with figures), 
; : Ralph E. Smith 203 
A new biennial-fruited oak (with plates II, III), - - ff. Hi S04 
The Wyoming species of Antennaria, - - . - Elias Nelson 208 
A new Colorado Antennaria, - - - - - Elias Nelson 212 
Ulvella Americana (with plate VII), —- - - - Julia W. Snow 309 
Recent work on the life-history of the Rhodophycez, 
radley Moore Davis 314 
Origin of timber belts, - - - - - - John H. Schaffner 392 
The spreading of buffalo grass - - - - John H. Schaffner 393 
A washing apparatus (with figure), - - - Elias J. Durand 394 
Phacelia Covillei at Mt. Carmel, | a] (eee : - - - J. Schneck 395 
A new Tilletia parasitic on Oryza sativa L. (with figures), } 
Alexander P. Anderson 467 
Alvin Wentworth Chapman (with portrait), | - - - Charles Mohr 473 
What is Prunus insititia? = - - - » - F. A. Waugh 478 
An undescribed birch from Alaska, - - = Walter H. Evans 481 
EDITORIAL— 
Science, falsely so-called - - - - - - . 8 a ae 
OPEN LETTERS — 
Imperfections of laboratory material, -  - - D.T. MacDougal 140 
The tropical laboratory, - - - - - D. G. Fairchild 320 
A ready supply of Vaucheria, : eters Bruno A. Goldberger 398 
Staining technique - - - - - H.F. Roberts 398 
A bryological memorial meeting, - — - . ee a 
CurRENT LITERATURE— 
ver titles see index under author’s name and Reviews. Papers noticed in 
Notes for Students” are indexed under author’s name and subjects. 
NEWs— 74, 150, 231, 329, 414, 496. 
