The leaves of some trees protect from epiphytic freeloaders via sheddable waxy coating.

References

"Some trees do so [get rid of plants residing on the surface of their leaves] by regularly shedding the waxy coat to their leaves." (Attenborough 1995:168)

Book
The Private Life of PlantsFebruary 19, 2017
David Attenborough

Organism
PlantsPlantaeKingdom