How do eucalyptus trees reproduce?

They reproduce using cones also known as seeds.
Pine trees grow pine cones much like a flower grows blossoms. Inside the pine cone their are seeds that grow and mature. Then the cone falls off to the ground where it dries out. As it dries, the cone opens up so that the seeds can fall out. Birds and rodents grab some of the seeds and carry them a certain distance away. Little pine trees start where the seeds are on nice, moist soil.

The seeds of some pine trees are called, "Pine nuts", and are edible and delicious. You can buy them at your grocery store.
seeds are in the pine cone
leafy gametes.
A pine tree produces cones which contain the seed to produce further generations.