East and Central North America. Broadly columnar, deciduous. Clusters of small red flowers before the leaves. Bluey-white under the leaves, which turn bright red in autumn. Prefers moist soils and will tolerate swampy soils.

Narrow crowned clone discovered in 1894 in New York with upright branching creating a shape similar to the Lombardy poplar. Clusters of small red flowers before the green leaves, bluey-white beneath, which turn bright red in Autumn. Prefers moist, rather acid soils, becomes chlorotic on lime rich soils.

Broadly columnar, deciduous. Appears to need fertile soils for good growth. Also known as rock maple. Spring sap is processed into maple syrup in USA and now in NZ. Orange is the predominant autumn colour, quite spectacular. Cold hardy.

Albania and Nth Greece. Broadly conical, deciduous. Large palmate compound leaves produce a dense shade. Large creamy white flowers, then prickly oval fruits, enclosing polished conkers prized by schoolboys in the UK. Best in fertile soils.