A HISTORY OF BOTANY 117 
tured to send leaves only. These, as it ae be — bag 
Alisma Plantago-aquatica more than those of our e Sagit- 
taria, and have undoubtedly misled the local Siaeuiae pith failed 
to notice this alien in their midst. The very succulent leaf-bases 
were not promising subjects for drying-paper.—G. CLARIDGE 
Drvuce.” 
A History gf Botany, 1860-1900. By J. Rrynoups Green, Se.D., 
RS. 8v "Pp. 548. Oxford: Clarendon Press. 1909. 
Price 9s. 6d. n 
THE task of wri ae a sepenaayon of Sachs’s well- known 
an 
in the history of botan science. This period, the beginning of 
which was almost coincident with the publication of the Origin of 
Species, has seen the rise and development of modern Botany. 
The publication of the reals of Hofmeister’s researches on the 
Cryptogams about the same time was perhaps as important for 
botanical science as the rehuatn of the doctrine of the seen 
view were for biological science generally. The destruction of i 
barrier between Cryptogams and Phanerogams made possible the 
conception of a gradual evolution of the great plant-groups, and a 
considerable quota of the work of the period in question has grown 
out of Hofmeister’s discovery of the similarity, indicative of 
affinity, between the course of life-history in the various great 
eat advances of the period has been the conception of the plant 
as a living entity reacting to its environment, and the great pre- 
reen’s 
increase in the number of workers and the almost innumerable 
memoirs which bate had to be dealt with, as contrasted with the 
few great works which characterized the earlier period. ‘Dr. Green 
has, however, thought it best to adhere closely to the 2 ies of 
Sachs’s original work, and the subject-matter is " herctore divided 
into three Books dealing keats ee with Morphology, ee 
and Physiolo These are preceded by a general introduction— — 2 
y sy: 
a useful résumé of the condition of the science at the beginning ¢ 
the period and of the e progress in the various fields of study during oe 
the forty years over which it extends. A 
Book 1., Morphology, compres ser tap on the nature of 
Alternation of Generations—an interesting account of the I 
this as in other : 
Sot at ‘the end of the century; the theory of meta 
