How are ginkgo pollen grains transported to female trees?

Ginkgo trees are dioecious, meaning that pollen-producing structures and ovules are borne on separate individual trees. During the spring, pollen grains are released from the microsporangia of male trees and are transported to female trees by wind currents.12

Upon reaching a female tree, the pollen adheres to a mucilaginous pollination droplet that exudes from the micropyle at the tip of the ovule's integument. The subsequent retraction of this droplet draws the pollen grains into a pollen chamber within the nucellus, where they eventually develop into pollen tubes to facilitate fertilization.2