This family has only one genus and nine species, distributed throughout
warm zones. Its allergological importance comes from its use as an
ornamental tree along avenues and boulevards.
In Spain, the most important is the Plane tree (Platanus
it is mainly located in the urban environments.
Plane tree pollen is small-medium sized (16-25 µm in diameter),
spheroidal, and with a somewhat reticulated surface.
Its pollinization is explosive in early Spring, between March and April,
with peaks that can exceed 2,000 grains of pollen/m3 of air).