Vol. IX. 
MAY, 1922 
No. 5 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AMERICA 
CONTENTS 
l^^to ovules with two embryo sacs W, J. Young 213 
Vegetative vigot of the host as a factor influencing susceptibility and resistance to certain rust 
V diseases of the higher plants II. .... • M.A.Raines 215 
Li|P|ification of mature phloem in herbaceous types . . . . . . . . Carl L. Wilson 239 
Observations on the effect of water-raking on the keeping quality of cranberries. 
, H. F. Bergman 245 
lacipient drying and wilting as indicated by movements of coconut pinnae. Sam F. Trelease 253 
Dr. W. J. Beal's seed-viability experiment . H. T. Darlington 266 
nattie&t solutioDS for wheat W. E. Tottingham and E. J, Rankin 270 
PUBLISHED 
IN COOPERATION WITH THE BOTANICAL SOCIETY OF AMERICA 
BY THE 
BROOKLYN BOTANIC GARDEN 
At Prince and Lemon Sts., Lancaster, Pa. 
london agents 
WHELDON AxND WESLEY, Ltd. 
28 Essex Street, Strand, London, W. C. 2 
Entered «« s«oond-da»s matter February 21, 1914, at the post office at Lancaster, Penn»ylvaniii, 
under the act of March 3, 1879 
