EXKURSIONSFLORA VON EUROPA 121 
which will presumably be available in such a course. If 
gams are to be introduced at all, the advantage arising from their 
inclusion will depend on a careful comparative study of the details 
of their life-histories, and this can only be done satisfactorily for 
a limited number. ‘Ra 
=i 
Exkursionsflora von Europa. Von Franz Tuonner. Berlin: R. 
Friedlinder & Sohn. 1901. Small 8vo, pp. x (50), 855. 
aper. Price 4 marks. 
Tuts well-printed work, which is designed as an “aid to the 
determination of the Genera of European Flowering-plants,” is 
certainly cheap at the money; though, as it is written wholly in 
German, its circle of English readers is likely to be but small. 
Iceland and the Azores are included; the Ural and Caucasus 
ranges being taken as the eastern limit. 
dromus, Nyman’s Sylloge, Wittstein’s Mtymologisches Worterbuch ; 
Pritzel and Jessen’s Deutsche Volksnamen der Pflanzen and Garcke 8 
Flora von Deutschland are taken as the standard authorities for 
* popular” names. tas 
Part I. contains a key for the determination of the orders ; 
Part II. deals in like manner with the genera. The arrangement 
adopted differs widely from that of our standard British floras and 
of Nyman’s Conspectus ; it will be sufficiently indicated by its main 
divisions :—Class I. Conifere; Class Il. Gnetales; Class 
Monocotyledonea (Typhacee to Orehidacea); Class IV. Dicotyledonee ; 
Sub-class A. Archichlamydee (Salicacee to Cornacea) ; Sub-class B. 
Metachlamydee@ (Pirolacee to Composite). 
Both the ordinal and the generic characters appear to be very 
well treated ; the descriptions are sufficiently full, without being at 
Journan or Botany. Vor. 40. [Maros, 1902.) kK 
