360 THE JOURNAL OF BOTANY 
=e ed Plants. By Evarne Warmine, Ph.D., Professor of 
eset University of Copenhagen, assisted by Martin 
ee h.D., &e.; prepared for publication in English by 
Percy Cee M.A., D.Se., &c., and Isaac Baynry BAt- 
Four, M.A., M.D., F. R.S., &e. Oxford: At the Clarendon 
Press. 1909. 8s. 6d. net cloth. Pp. xi, 4 
world. In this one expressly is sept for English readers, 
i with the multitudinous 
so of others—Eremophytes, Pailephyt “4 Mesophytes, Cherso- 
of w be rom the names by which they are 
hie dee ac es minute particulars are furnished of 
© modifications of growth and structure by which plants are 
are 
Te o attempt any detailed rae of such a work would be 
possible only for one who had surveyed so vast a field with the 
knowledge and industry which the author brings to his task, for 
without such qualifications it would be a manifest impertinence 
to ser an opinion upon a many points raised at every turn 
by one who is recognized as a foremost authority, and as having 
devoted himself with indetatigable zeal to questions which he has 
in a special manner made hi It must suffice to say that 
here we have abundant ara ‘provided for those who desire to 
do practical work in this field, by paying our author the truest of 
compliments and subjecting his nen to the test of careful 
scrutiny in nie li hae of observed fact 
8 
told (p. 367) “ Alders ate their most luxuriant development on 
well-drained soil.” The explanation follows, ‘but they are usually 
expelled from this by competing trees. Only in swamps, where 
they do not thrive so well, are they dominant. In like manner 
Calluna vulgaris flourishes upon rich soil better than on poor soil, 
but it is excluded from the former by competing species.” Simi- 
larly we are told (p. 71), “When in Denmark we find the oak 
