326 



UNITY AND DIVERSITY IN BIOCHEMISTRY 



phylogenetic implications of this concept, or at least, to be more cautious, 

 its importance with respect to classification, is obvious. 



Even as early as 1854 the Austrian chemist Rochleder clearly stated the 

 taxonomic importance of the biochemical characteristics of plants, where 

 the more general classes were concerned, thus : "Die Familienahnlichkeit 



Table XXII 



Biochemical characteristics of the algal classes 



(compiled by G. E. Fogg, 1952) 



der Pflanzen is bedingt durch das gleichzeitige Vorhandensein mehrerer 

 Stoffreihen". Much information on the relations between the biochemistry 

 and the taxonomy of plants will be found in Molisch's Pflanzenchemie und 

 Pflanzenverwandschaft and also in the Handbuch der Pflanzetia?ialyse. Some 

 very interesting studies have been carried out by Erdtmann on the chemical 

 taxonomy of the heartwood constituents of conifers. 



