American Sycamore, Buttonwood
These trees are all large, with a heavy trunk (or trunks) and a sculptural branch pattern. Older bark sheds in patches to reveal pale, smooth new bark beneath. Big, rough-surfaced leaves (to 10 in. across) have three to five lobes and resemble maple (Acer) leaves. Fall foliage color is yellowish to brown, not striking. Ball-shaped brown seed clusters, usually on threadlike stalks, hang on the bare branches through winter; these are prized for winter arrangements. Best in rich, deep, moist, well-drained soil. All are subject to anthracnose, which causes early leaf drop and twig dieback. Rake up and dispose of dead leaves, since fungus spores can overwinter on them. Chlorosis may be a problem in the desert.Platanus occidentalis
Native to the eastern U.S. Has a long leafless period. Irregular habit, contorted branches. Occasionally grows with multiple or leaning trunks. Old trees near streams sometimes reach huge size. Best in a large wild garden.
Native to Iran, Afghanistan, and central Asia. Absolutely covered with slender, sinuous spikes of...
Native to Siberia. Sturdy, upright habit to 2–3 ft. high and 1 1/2–2 ft. wide. Dark green,...
The most widely grown irises fall into the bearded group. More than a century of breeding has produced...