TABLE OF CONTENTS 
Two trunk diseases of the 
mesquite (with plates 6 
BET ues sn 
А trunk disease of the Шас 
(with plates 8 and 9)... .. 
Descriptions of North Amer- 
ican Senecionee (with 
plates 10, 11, 12, 13, and 
Pte I 
A study of the physiological 
relations of Sclerotinia cin- 
erea (Bon.) Schréter..... 
The Thelephoraces of North 
America. II. Craterellus 
(with plates 15,16, and 17) 
The effects of surface films 
on the rate of transpira- 
tion: experiments with 
potted potatoes (with plate 
BR cin. B. M. Duggar and J. S. Cooley 
The Thelephoraces of North 
America. III. Craterellus 
borealis and Cyphella 
(with plate 19)......... 
Some oenotheras from Che- 
shire and Lancashire (with 
Hermann von Schrenk 
Hermann von Schrenk 
J. M. Greenman 
J. Б. Cooley 
Edward A. Burt 
Edward A. Burt 
plates 20, 21, and 22).... R. R. Gates 
A Texan species of Megap- 
terium (with plate 23).... R. R. Gates 
Diagnoses of flowering plants, 
chiefly from the southwest- 
ern United States and 
Mexico (with plates 24, 
25 and 26) J. M. {Greenman and С. Н. Thompson 
Enzyme action in Fucus ve- 
siculosus L........ B. M. Duggar and A. R. Davis 
с index ido volume I..... ee 
PAGE 
243-252 
253-262 
263-290 
201-326 
327-350 
351-356 
357-382 
383-400 
401-404 
405-418 
419-426 
427—432 
