47 



Ahonanda nerifoUu, Bud dark led-purplo, Ijecoiiies u 



lemon-yellow. 

 Viola (ncoloi'. Bud doc[) })uii)lc, occuwiouidly changes to 



yellow. 

 Liliuiu Nepelen,'<e, red-})ui'i)lc, ui)|)ei- half of i)etals yellow. 

 Tul)erose, Jasnnnc and uiany other white Howers fade to 



a yellowish color. 



Numerous existing yellow tlowers are known to have been 



derived from purple ancestors by the still remaining purple 



eye ; examples may be seen in IHbisca>i Trionujn, H. escu- 



laiidis, Gos.sf/j}inh/, Coreopsis, Lijsuiiachia, Cidochorlis, etc. 



CHAPTER X. 



The color of a flower is not generally intlueiiced by that 

 of the sap: Dandelion, Lactuca, SoncJim, Hieracium, Naba- 

 lus, etc., 1ku-c white s'lji Imt yellow tlowers: Chelidoniwa 

 has orange colored sap and yellow flowers ; Sanguinarki, 

 orange-red sap and white flowers ; Asclejnas, white sap and 

 l)urple tlowers; Apoci/num, milk-white sap with stems, 

 petioles, })eduncles and calyx of a reddish color, corolla 

 white and lose, or wholly piidv. 



The orange-red color of the root of celendine gradually 

 changes up the stem to the exact yellow tint of the flower 

 at the end. 



The change of the same colored sa}) to white in the flower 

 of Bloodroot seems remarkable, and yet yellow to white is 

 a common secpience in flowers, and white to puik or purple 

 is also connnon. 



