Beech, Fagus sylvatica, Low angle view of a woodland of tall, slender trees with bare branches against a twilight sky, One tree in centre with a white arrow pointing up painted on it.

Beech, Fagus sylvatica, Low angle view of a woodland of tall, slender trees with bare branches against blue sky.

Alder, Alnus lanata, Close view from underneat of a cluster of catkins in the spring, against blue sky.

Heliconia rostrata, often known as Lobster claw, Detail of the bright red petals tipped with yellow and green, Overlapping to create a pattern.

A silver grey Fan palm cultivar, Close view of the ribs radiating out from the centre and some protruding at the top, Against blue sky, Shot in Vietnam.

A silver blue grey Fan palm cultivar, Close view of the ribs radiating out from the centre, Shot in Vietnam.

A silver grey Fan palm cultivar, Close view of the ribs radiating out from the centre, Shot in Vietnam.

Himalayan blue poppy, Meconopsis regia, Close view of overlapping leaves forming a pattern, Masses of fine hairs causing water droplets to be raised off the leaves.

Butterhead lettuce, Lactuca sativa ' Imperial Winter', Top view of a few heads of lettuce close together forming an overall pattern.

Sage, Salvia officinalis, Close up of mass of dense green leaves of the garden herb.

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

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