398 THE JOURNAL OF BOTANY 
describes 315 species as against 293 described by Sonder in the 
ae ee gee in _ this however affords — a gener — basis 
of those maintained were Aeon sg Haworth. Seven ~ 
—M. ochrac 
pertinum, M. Hookeri (M. Sabicditstlacs Hook: fil. in sot : Mae. 
t. 6077, non Haw.), M. Wettstenzz, M. calculus, M. pseudo- truncu- 
tellum: M. linguiforme L. is extended to cover a wide ran ge of 
forms originally described as species, eleven of which are main- 
tained as vere ies. 
The Portuwlacacee occupy but small space; fifteen, of which 
two are on are included under oe, a comers genera 
are Portulacaria, Calandrinia, Lewisia, an 
e book is admirably printed, and will oan dietalonbis 
those who read German, in which it is written; the aiodkratioat 
are very useful. 
napster und i as der ee oe — der Schwe- 
schen Ausgabe. By LER. Erster Teil. Das Chemische 
Material der Pheasem: vit einer Abbildung im Text. Pp. 238. - 
Amacom run Friedrich Vieweg und Sohn. 1908. 6 Marks. 
E great development which botanical science has undergone 
ding the past five-and- -twenty years, however interesting it may 
have been from many points of view, has been attended with a 
certain inconvenience to this student. The immense amount o 
research which has marked the period has led to the publication 
of a great flood of literature, and papers of varying importance 
have appeared in a vast number of journals in different ~cusrvestoe 
The duty of pane bet tein the substance of these papers 
been realized as a very pressing one, and little by little most of it 
has been discheaige by the publication of works on anatomy, 
phivaiaair and other branches of the science. ranch, how- 
ever, has been almost esl a akin to vegetable physiology on 
the one hand, and to organic chemistry on the other, the bio- 
chemistry of the ara has attracted neither, and till recently any 
information require to be sought for in the original memoirs. 
o a large extent tines was remedied by the appearance a few years 
ago of Professor Ctzapek’s great work, but the almost encyclo- 
peedic nature of this put it out of the reach of many. It is there- 
fore a matter of great interest to find that Dr. H. Euler, of the 
University of Stockholm, has in preparation a smaller work on the 
subject, of which the Grundlagen i is the first volume. 
s he has put together, in a somewhat condensed form 
perhaps, the chemical characteristics of the constituents of the 
body of the plant. He has treated of them under three principal 
heads, noticing the non-nitrogenous compounds of the fatty and of 
the aromatic series, and subsequently the nitrogenous substances. 
On the whole he “had done the work prior in spite of the great 
difficulties He has set before him the object 
of producing a book which shall be iiadables and reliable, presenting 
