APPENDIX 223 



Pelargonium. The pigment of the scarlet P. zonale, var. ' Meteor,' 

 is pelargonin as previously stated ; so also is that of the bluish-pink 

 P. peltatum. But a violet-red variety of P. zonale was found to contain 

 cyanin, chiefly, accompanied by a little pelargonin. This is the first 

 case which has arisen of a flower containing two anthocyanins. 



Dahlia.. The deep brown-red double (Cactus) varieties, 'J. H. 

 Jackson,' 'Harold,' 'Matchless,' 'Night' and 'Othello' form cyanin: 

 the scarlet-red varieties 'Rakete' and 'Alt-Heidelberg,' pelargonin. 

 Pelargonin, together with a little cyanin probably, was also found in 

 a dark-violet variety. 



Delphinium. The violet variety contains delphinin ; the blue type 

 the potassium salt of delphinin. 



We may now set out the distribution of the anthocyanins 1 as far 

 as they are known, as follows: 



Pelargonidin C 15 H 10 5 . 

 Pelargonin = diglucoside of pelargonidin. 



Flowers of scarlet Pelargonium zonale Pelargonin as an acid (tartaric) 



oxonium salt 



violet-red var. of P. zonal? ... Pelargonin (together with cya- 



nin) 



,, bluish-pink P. peltatum Pelargonin 



,, scarlet-red var. of Dahlia Pelargonin 



,. dark violet var. of Dahlia ... Pelargonin (together with (?) 



cyanin) 



,, pink var. of Centaurea Cyanus ... Pelargonin 



Cyanidin C 15 H 10 6 . 

 Cyanin == diglucoside of cyanidin. 



Flowers of violet-red var. of Centavrea Cyanus Cyanin 



,, blue type of C. Cyanu-? ... ... Potassium salt of cyanin 



,, brown-red var. of Dahlia Cyanin 



,, magenta Rosa gttUica Cyanin 



,, violet-red var. of Pelargonium zonale Cyanin (with pelargonin) 



,, (?) magenta Paeo nia Paeonin = diglucoside of paeoni- 



din which is a monomethyl 

 ether of cyanidin 



Fruits (red) of V actinium Vitis-idaea Idaein=monogalactoside of cya- 

 nidin 



1 It should be borne in mind that all data given below depend upon the analyses of 

 the oxoniutn salts of the pigments and not of the pigments themselves. 



