56 Miss M. Wheldale. Colours and Pigments of [Oct. 31, 



Zinnia elegans shows the anthocyanin-xanthin series, with pale yellow 

 derivative plastids from xanthin. Anthocyanin gives the usual magentas, 

 pinks, crimsons, and orange on the pale and deep yellows. 



Cruciferce. 



Brassica sinapis has plastids containing xanthin. 



Cheiranthus Cheiri has two yellow varieties, a deep and a pale ; the former 

 has plastids containing both carotin and xanthin. It is probable that the 

 pale yellow contains xanthin only, though it has not been tested. Antho- 

 cyanin gives the crimson or brown on the deep yellow, and the purple 

 varieties on pale yellow respectively. 



Matthiola shows the anthocyanin series with purples, reds, and whites, 

 the latter having colourless plastids ; anthocyanin may also exist with plastids 

 containing a " cream " pigment differing from both carotin and xanthin. 



Cucurbitacece. 



Cacurbita Pepo has plastids containing carotin and xanthin. 



Fumariacece. 



Corydalis lutea appears to have plastids containing xanthin and a yellow 

 xantheic pigment precipitated by basic lead acetate as an orange-yellow 

 precipitate. 



Hypericacece. 



Hypericum Hooherianum has plastids containing xanthin. 



Leguminosce. 



Coronilla viminalis has plastids containing carotin and xanthin ; some 

 anthocyanin is also present. 



Lathyrus odoratus shows the anthocyanin range, purple, red, and white. 

 Also a " cream " plastid pigment similar to that in Matthiola. 



Spartium junceum has plastids containing carotin (?) and xanthin. 



Liliacew. 



A variety of Lilium tigrinum was found to contain plastids and antho- 

 cyanin. From the plastids a brick -red pigment was extracted giving a blue 

 colour with sulphuric acid, though no purple was detected ; it is probably a 

 form of carotin. 



Linaceaz. 



Linum flavum has plastids containing carotin and xanthin. 



