Tree ID: Flowers, Fruits, and Seeds

While leaves and bark offer continuous clues, a tree's reproductive structures—its flowers, fruits, and seeds—provide the most definitive and taxonomically stable features for field identification. Because these structures have evolved specific configurations to optimise pollination and seed dispersal, they vary dramatically between genera.

In early spring, many wind-pollinated broadleaved trees produce catkins: long, drooping cylindrical clusters of simple flowers designed to release clouds of pollen before leaves emerge. Others, like fruit-bearing orchards, produce showy, insect-attracting blossoms. As these flowers are fertilised, they morph into an incredible array of distinct fruit and seed types.

Observers look for specialised shapes, such as the winged 'samaras' or keys of Maples and Ash, which spin like helicopters in the wind; the heavy, protective wooden cups (cupules) housing the acorns of Oaks or nuts of Sweet Chestnut; or the colourful, fleshy berries and drupes of Rowan and Cherry designed to entice passing birds.

For conifers, identification shifts to the geometry, rigidity, and scale placement of their woody cones, noting whether they sit completely upright on the branch or hang downward.

Tracking these seasonal reproductive stages not only helps with a tough identification, but provides a direct insight into a tree's seed dispersal mechanism, reproductive cycles, and overall health.