470 THE AMERICAN NATURALIST. [Vol. XXXVII. 



a hyacinth with a truss of flowers perfectly blue on one side and 

 perfectly red on the other. Several of the flowers were also 

 striped longitudinally red and blue. 



Anthophain. — In most instances the brown colors of flowers 

 are caused by a mixture of chlorophyll or carotin with anthocyan. 

 Among brown flowers containing two pigments are Calycanthus 



Asarum, Adouis vcmalis, Kibes grossu/aria, and various species ot 

 orchids. But in the black spots and brown markings on the flow- 

 ers of Vicia faba and of some species of Delphinium, Mobius 

 finds an olive brown pigment dissolved in the cell sap. 1 As its 

 chemical reactions and optical properties are sufficiently charac- 

 teristic to distinguish it from other plant coloring substances 

 he proposes for it the name of anthopha in. The spots on the 

 wings of Vicia faba appear black largely because of the papilla- 



vvhere the markings are brown. The properties of anthophaein 

 are very similar to those of phycophaun, the pigment peculiar to 

 the brown Algae ; but it differs from this substance in that it is 

 dissolved in the cell sap, while phycophaei'n, together with chlor- 



