On the Colour and Smell of Plants. 



1. Red-flowering Genera. 



a Red-flowering genera, containing 012 per cent, white, do not occur. 

 b Red-flowering genera, containing 12 70 per cent, white in their flowers. 



Of 105 species, 12 are odoriferous, hence 11.4 per cent. 

 c Red-flowering genera, containing 70 100 per cent, white in their flowers. 



Of 30 species 10 are odoriferous, thus giving 10 per cent. 



2. Violet- Flowering Genera. 



a Violet-flowering genera, with 12 per cent, white, do not occur. 

 b Violet-flowering genera, with 12 70 per cent, white in their flowers. 



Of 20 species there is not one odoriferous. 



o Violet-flowering genera, containing 70 100 per cent, white in their flowers. 

 Of such the Rubiaceoe contain only the genus Faramea, which contains 

 83 per cent, white, and 16 per cent, violet. Of 6 species 1 is odorife- 

 rous. 



3. Blue- Flowering Genera. 



a Blue-flowering genera, with 12 per cent, white do not occur. 



b Blue-flowering genera, with 12 70 per cent, white. To this belongs the 

 genus Spermacoce, which t in its flowers contains 21 per cent, white, 23 

 per cent, blue, 7-7 per cent, red, and 7-7 per cent, violet. We have al- 

 ready mentioned that it contains very few odoriferous species, there be- 

 ing not 1 in 13 plants. 



4. Green-flowering Genera. 



a Genera which contain 12 per cent, white do not occur. 



b Genera in which we observe 12 70 and 70 100 per cent, white. 



