Yes they do flower and you get seeds from them - winged ones like a Sycamore and Maple. They are native to China, Taiwan and Japan so the insects there I assume will pollinate them. As I have seen then seed in the UK any number of insect, does not have to be small, just needs to get the pollen in the right place.

Hi

They can be wind pollinated as well

The seeds are easy to grow just collect in the Autumn put in a pot cover with grit leave by the back kitchen wall , I have two baby ones about year old now and have planted both in a bonsai pot makes them more special as the parents I have had for over 20 years and they are also in the same huge ceramic pots !! when I 1st planted them in, John innes no 3 added grit and slow realease fertiliser in late April and well waterd through the summer

Gg

Thanks gnarly im suprised its one of those plants i thought you must be a specialist to grow. thanks also kildermorie. ;)

there aresome very tiny beetles that crawl about the leaf litter and polynate such flowers . beetles are bye far the most common type of insect on the planet but like leopards arnt the easist creatures to see .