Sycamore trees can grow up to 30 metres tall, bearing large palmate leaves with five lobes. The small green flowers hang in drooping clusters: this distinguishes it from Maple, where the flowers are borne in erect clusters. In autumn, these become clusters of two-winged keys: these wings act as a propellor to disperse the seed.
In autumn, the leaves turn yellow (although they are not as colourful as those of the maple). Sycamore leaves can often be infected by a fungus called tar spot, which causes shiny black blotches on the leaves.

Flowers		Keys		Trunk

Leaf buds, plus remaining stalks from previous year's keys		Early leaves, with pinkish tinge		Early leaves, with red inner bud scales

Leaves changing colour		Tar spot on leaves