|Distribution: A genus of about 60 species from the Northern Hemisphere; 1 or 2 species
sparingly established in Victoria.
Description: This genus is a group of deciduous trees or shrubs. They are monoecious and have bark that is dark brown to chalky white and is smooth.
For more details regarding the description of species within this genus please see: https://vicflora.rbg.vic.gov.au/flora/taxon/9654af5f-bccf-4415-8736-efd0e12d1567
Pollen Morphology: The pollen grains from this genus have a circular shape in polar view and an elliptical shape in equatorial view. These pollen grains are between 18-25um in size and have 3 pores that are evenly spaced around the equator. These pores protrude slightly from the grain and have thick circular rings around each pore. The surface of the pollen grain is smooth, however the interior (plasma) is finely granular.