The stamens of Kalmia are drawn down and backward by the expanding corolla, to such an extent that, when released from their attachment by insects in search of honey, they throw their pollen up and forward toward the stigmatic surface with considerable force. A few measurements gave the following as the distances to which the pollen was projected :

Kalmia glauca.

Vertically.

Horizontally.

5.2

c. m.

7.5

c. m.

6.0

"

8.0

"

7.5

"

Kalmia latifolia,

14.0

"

9.0

"

13.0

"

From this it is evident that, while the direction of the pollen is toward the stigma of the same flower, the chances are more favorable for its reaching any other flower of the same inflorescence.