of Colour and Form in Plants. 403 



Coleus Blumei. 



j * f centre, red or red-purple. 



\ border, green or yellow-green. 



Victoria Regia. 



j r- f lower surface, red-purple. 

 \ upper surface, yellow-green. 



Taxodium sempervirens. 



Young shoots, yellow-green. 

 A year old, red-purple. 

 Older still, citrine. 



In this last instance, as well as in many others, advanced 

 growth seems to be accompanied with greater composition of 

 colour. In the curious pitcher-like organs of Sarracenia, Ne- 

 penthes and Dischidia, we find that red-purple and yellow-green 

 are associated. 



In the flower, similar associations are the rule. 



Ranunculus repens. 

 Corolla, yellow. 

 Calyx, purple spots. 



The same may be observed in many other species of the same 

 genus. 



Hieracium pilosella. 

 Flower, yellow. 

 Those of the circumference variegated with purple. 



Anthyllis vulneraria. 

 Corolla, yellow. 

 Tip of calyx, purple. 



Saxifraga ligulata. 



Corolla, white with purple spots, 

 Anthers, yellow. 



Kalmia (species). 



Ten spots of purple on the corolla at points in contact with the 

 yellow anthers. 



Juncus compressus. 



Anthers and pollen, yellow. 

 Ovary and stigma, purple. 



Perianth ( ^ge, russet. 



^ centre, dark green. 



Strelitzia Regime. 

 juncea, fyc. 



Sepals, orange. 



Petals, blue. 



26* 



