Abstract
Pollinating insects, bees, bumble-bees, butterflies, and moths have been found able to distinguish numbers, if these are expressed in symmetrical figures. This ability seems to be dependent upon the stage of psychic development of insects and varies considerably among different groups. Different groups of nos. are clearly expressed in the flower types and may serve as pointers for pollinating insects to find their plants. The comparative study of flower types provides a new approach to the evolution of flowering plants.

This publication has 1 reference indexed in Scilit: