SUPPLEMENT 



TO 



OBSERVATIONS 



ON 



THE COLORS OF FLOWERS. 



Among various notices of my Observations on the Colors 

 of Floivers, certain criticisms which appeared in The Amer- 

 icrrn Naturalist and The Gardeners' Chronicle, may conven- 

 iently, and, as it seems to the writer, very properly he 

 referred to in this supplement to the same. 



The Gardeners' Chronicle of Feh. 10, 1900, while giving 

 on the whole an appreciative notice of my pamphlet, sug- 

 gests, very courteously, that on the subject of honey guides 

 I might have "unconsciously absorbed and api)ropriated '" 

 Mr. Henslow's theory. 



But as a matter of fact 1 had not read or heard of Prof. 

 Henslow's Orir/tn of Florcd Structures until 1 had formed 

 my opinions from my own observations upon the genesis of 

 honey guides, and the "copy" was ready for the printer. 

 Moreover it would seem that The Gardeners' Chronicle 

 wholly misapprehended my views u})on the subject, although 

 special pains were taken to present them clearly. As my 

 ideas were totally different from those of Prof. Henslow, 

 both his and mine will now be re-stated, l)ut in different 

 phraseology from the originals. 



Prof. Henslow's method may be understood by sup[)osing 

 bees or other insects, in pursuit of nectar, to alight habitu- 

 ally, season after season, ui)on a j)articular petal ()f, tor 



