12 On the Colour and Smell of Plants. 



according to their principal colours ; the colours next in abun- 

 dance are added to each principal colour, in order to ascertain 

 the greater or less tendency of the separate species to this or that 

 colour. This will be rendered more distinct by the following 

 tables : 



1. Red Flowering Genera. 

 a. Genera which contain 12 per cent, white in their flowers. 



Among 300 species there are 17 odoriferous, therefore among 100 a mean 

 of 5.G6. 



L. Genera which contain 12 70 per cent, white in their flowers. 



Among 962 species there are 126 odoriferous, and hence taking the mean 

 13.09 per cent. 



