Boston ivy, Parthenocissus tricuspidata, Close-up detail of red autumn leaves.

Boston ivy, Parthenocissus tricuspidata, Close-up detail of green leaves turning red and yellow in autumn.

Bear's breeches, Acanthus mollis, Side view of seedhead bearing bright green fruit containing seeds on a plant in autumn.

Spinach, Spinacia oleracea, Close-up detail of a green vegetable leaf in sunlight.

Canna indica, Close up of unusual purple seed pods in autumn.

Nasturtium, Tropaeolum majus, Close up of green leaves showing the white veins.

Blackthorn, Prunus spinosa, Abundant harvest of purple sloe berries and a few leaves from the shrub.

Blackthorn, Prunus spinosa, Abundant harvest of purple sloe berries.

Oak, Quercus robur, Acorns growing on the branches of tree in late summer.

Blackthorn, Prunus spinosa, Abundant purple sloe berries growing on a shrub in the autumn in the New Forest.

Blackthorn, Prunus spinosa, Abundant purple sloe berries growing on a shrub in the autumn in the New Forest.

Rose mallow 'Blue Bird', Hibiscus syriacus 'Oiseau Bleu', A single purple blue flower with white stamens.