(1) There was a weeping wisteria and a massive hornbeam tree, where we built a tree house.(2) In addition you can expect to see rare species of hornbeam , Douglas fir and black gum, and a well-forested block of South Colorado Street.(3) But what is interesting for visitors is that the garden is still evolving: a gravel garden with silver plants is surrounded by a cloister of youthful hornbeams .(4) The forest has little undergrowth and is mainly composed of beech and pine, interspersed with a few oaks and hornbeams .(5) He gives four options for the future of the hornbeams : remove the trees and replace them with a more suitable species; phase out the trees by removing two now and the remaining two five years later; thin the trees out or do nothing.