trum jnirpvrascens jrroenish and purplish, Myosurus green- 

 ish, TrolHus greenish-yellow, Ilellehorus, several speeies, 

 greenish or wholly green, /i7io?r?^owi« greenish-yellow, Isop- 

 yrum greenish-white, Ilydmstis greenish-white, ete. 



This change from green to white is common on the mar- 

 gins of green sepals, as in ]Sfymph<va odorata, Slellaria, 

 Buda, Phintago, etc. 



Polygala sanguinea has three sepals green, the original 

 color, and the two lateral sepals purple. P. poly gaum has 

 three sepals green with rose-purple edges, the other two 

 Ijeing rose-purple like the petals. Dutchman's Pipe has the 

 curious green corolhi shaded and dotted with purple. 



The large white involucre of Cornus Florida is like most 

 real flowers, green before becoming white. Indeed, in 

 Clematis several species described as purplish are lacking 

 the clear color because they are dulled by green ! 



In Pwonia Browtiii, of same family, the brownish-red of 

 the [)etals doubtless results from the mixing of chlorophyl- 

 green and red, an<l the l)rown-purple of Xaiifliorriza from 

 the mingling of green and purple. 



We find positive evidence, therefore, that some of the 

 earliest and simplest members of Ranuncidacea' are still 

 green, and that others have green as a foundation color, 

 from which white, purple, red and yellow may in any order 

 originate , 



GREENISTI-VELLOW, 



That a green flower may become yellow in a manner 

 analogous to a green leaf becoming yellow, is too well 

 known to require connnent. in some instances the yellow 

 is apparently a direct product of a previous green, resulting, 

 as in foliage leaves, from the disintegration of the chloro- 

 phyl and the disappearance of the blue element. This 

 yellow is reg:irded by some chemists as an entirely distinct 

 pigment and has been n;imed Xanthophyl. Of course the 

 yellow developed directly from white in the case of Loni- 

 cera longijiora, nmst be of a different character. 



