"an old timer who earned his living cutting trees for mine props and whatever, told me years ago, there aren't many pure tree species anymore. They've somehow all crossbred over time."
Yeh, eucalyptus hybridizes like the weed that they are. Not bad firewood though. The bigger they are the harder they fall. At least when you bring a big one down it leaves a lot of room to plant a number of more environmentally useful species once you have repaired the soil.
