Quercus agrifolia x rubra

A very rare opportunity to aquire this hybrid, which has occurred here in the UK from growing seed of agrifolia where it has clearly been pollinated by the nearby Q. rubra. This will presumably make a medium sized tree. Foliage is intermediate between the parents, though varies between individuals, but much smaller than rubra. As one is evergreen and the other deciduous I am assuming these will be semi-deciduous. Fully hardy in the UK.