Acer macrophyllum Pursh Oregon Maple or Big Leaf Maple Native to west coast of N. America from California to Alaska, sometimes grown in parks and in collections. Large tree to 30m (100ft). Flowers form a long spike 25cm (l0in) opening in April. The keys have wings 5cm (2in) long joined at about 90°. Leaves are unusually large, 15-30cm (6-12in) across. A small specimen is shown. They display bright orange colours in autumn in their natural habitat, but are often less spectacular elsewhere.