Wakeman—Pigments of Flowering Plants. 
835 
b. ) Penthydroxides. 
Cyanidin. 
Paeonidin. 
c. ) Hexhydroxides. 
Delphinidin. 
Myrtillidin. 
Mai vi din. 
Oenidin. 
•Classified with reference to the position of one of the hydroxy 
groups, i. e. as to whether or not it is in a position thus pro¬ 
ducing a flavonol group, the flavone pigments, as already pointed 
out, fall into two classes. 
1. The true flavones. 
2. The flavonols. 
This classification appears desirable inasmuch as Willstaetter 
looks upon the anthocyanin pigments as related to the flavonols 
but not to the true flavones. 
True Flavones Flavonols 
Tetrahydroxides of Chalkon 
Dihydroxy flavones 
Chrysin 
Tectochrysin 
Penthydroxides of Chalkon 
Trihydroxy flavones 
Apiginin 
Acacetin 
Dihydroxy-flavonols 
Galangin 
Galangin methyl ether 
Hexhydroxides of Chalkon 
Tetrahydroxy-flavones 
Trihydroxy-flavonols 
Luteolin 
Fisetin 
Kaempherol 
Kaempherid 
Luteolin methyl ether 
Lotoflavin 
