Cider gum, Eucalyptus gunnii, small sprig of mature leaves against white background with shadow.

Coconut, Cocos nucifera, segment with shell with shadow against white background.

Coconut, Cocos nucifera, segment with shell, and a Tahitian gardenis or Tiare flower, Gardenia tiatensis, together these are the ingredients of Monoi oil.

Pear, European pear, Pyrus communis 'Robin' sprig of unopened blossom buds with leaves. Backlit close view.

Pear, European pear, Pyrus communis 'Robin', sprig of unopened blossom buds with leaves. Backlit close view.

Pear, European pear, Pyrus communis 'Robin', sprig of blossom with leaves close view showing stamen.

Blackthorn or Sloe, Prunus spinosa, blossom on bare wood twigs against a blue sky.

Blackthorn or Sloe, Prunus spinosa, blossom on bare wood twigs against a blue sky.

Beech, European beech, Fagus sylvatica, leaves and twigs seen from underneath, in sunlight against a blue sky. Close view of several leaves.

Beech, European beech, Fagus sylvatica, leaves and twigs seen from underneath, in sunlight against a blue sky.

Cherry, Prunus, showing the difference between the defoliated tree above the trail and the healthy one below and the pollution from the aircraft flying over London?s East End.

Common oak, Quercus robur, leaves infested with the common spangle gall caused by the cynipid wasp.