TABLE OF CQR IE i: 
PAG 
Studies on reduction in plants (with plates 1-v1), . - Geo. F. Atkinson I 
Flowers and insects. XIX, - - - - - - Charles Robertson 27 
The origin of the leafy sporophyte, - - - - John M. Coulter 46 
The development of the microsporangia and microspores E 
of Hemerocallis fulva (with plates v1, vit), Edward L. Fullmer 81 
The spore-mother cell of Anthoceros (with plates 1x, x), Bradley Moore Davis 89 
The structure and oe eam of mean area tenerum 
(with six figures), . . Le Roy Abrams 110 
The compound oosphere of Albugo bliti (with plates xI-xv), F. Z. Stevens 149, 225 
A bacterial disease of the sugar beet (with plates xvI-xx), 
Clara A. Fuaniechon 177 
Revision of the North American species of Tephrosia, - B. L. Robinson 193 
Note on the development of the holdfasts of certain Floridee 
with plates XXI—xxXIII and five text-figures), —- - Carrie M. Derick 246 
On the toxic effect of deleterious agents on the germina- 
tion and development of certain filamentous fungi, - Jj. F. Clark 289, 378 
The development of the microsporangium and microspores 
in Convallaria and Potamogeton (with plates xxiv, 
XXvV), - - - - - - - - Karl M. Wiegand 328 
Some Rocky Mountain Chrysothamni - - oie Aven Nelson 369 
Studies in Crategus. I, - - - - - - ‘C. D. Beadle 405 
BRIEFER ARTICLES — 
The seedlings of Jatropha ashok: L. and Persea gratissima 
Gartn. (With six figures), Theo. Holm 60 
On the blight of Sorghum, - - Maxime Radais 65 
- Frank Haines Lamb 69 
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Root suckers on Douglas fir, 
Notes on travel. I, II, - - - - David G. Fairchild 122, 203 
Some species of Tetraneuris and its allies - - - Aven Nelson 126 
Pycnanthemum verticillatum, a misinterpreted mint, M. L. Fernald 130 
Three new Choripetalze from North America and Mexico, 
B. L. Robinson 134 
VOLUME Xxvill] v 
