1895.] Anatomical and Physiological Researches. 27 
cal details of many species of this genus, and we have now 
received a still more comprehensive treatise by Lemcke,* 
wherein an attempt has been made to arrange the species in 
natural groups by means of their anatomical characters. 
The first chapter of this interesting and important work 
contains a review of the literature upon this subject. 
The author has studied especially the internal structure of 
the rhizome, but several points of interest have also been 
given in regard to the anatomy of the aerial stem and the leaf. 
Boeckeler’s system* has been followed as a basis in the present 
investigation. . 
The material examined includes representatives from Eu- 
rope and North America, so that the paper becomes very 
helpful to similar studies in this country. 
Very little has been added to the results given by earlier 
features in the structure of this genus, but the present paper 
embodies the first attempt to arrange the species anatom- 
ically. 
It would be impossible to give a satisfactory review of all 
the anatomical peculiarities in condensed form, and we there- 
fore restrict ourselves to a brief comparison of some of the 
results. 
The author has found the anatomical structure of the 
thizome sufficient for the discrimination of the various groups, 
and in many instances the species are readily distinguished. 
The system suggested by Christ,® seems to be the most nat- 
ural, although the author admits that he was not able to find 
In anatomical characters sufficient foundation for several of 
the sections in this system. 
€ arrangement of the species in Heterostachyez, Homo- 
Sstachye, Cephalophore and Monostachye in the system of 
Christ is widely different from that which has been proposed 
by Bailey.* For instance: Christ refers CC. obtusata, pyre- 
Lemcxe: Beitrage zur Kenntniss der Gattung Carex. 1-130. 1892. 
[Inaug. Dissert. Konigsberg in Pr. 
Die Cyperaceen des kGniglichen Herbariums in Berlin. Linnea N. S. 
77.) 
*Nouveau catalo ue des Carex d’ Euro - 
: pe. Comptes-rendus d. séances de la 
Société Roy. de Botanique de Belgique 24:—. 1885. 
Acaneretiminary synopsis of North American Carices. Proceed. of American 
emy of Arts and Sc. 22:—. 
Stace 
