Arrowhead is an aquatic plant of shallow water and slow-moving waterways. In bloom over summer, it displays small, white flowers, but it is the arrow-shaped leaves that are most distinctive.

Although they might not look it, sea cucumbers like this one belong to the Echinoderm group and are therefore closely related to starfish and sea urchins

Look for the White water-lily in still and slow-moving water, such as ponds, ditches, lakes and canals. Its lily pads and massive, white flowers float at the water's surface.

Look for the Yellow water-lily in still and slow-moving water, such as ponds, ditches, lakes and canals. Its lily pads and cupped, yellow flowers float at the water's surface.

The carnivorous lifestyle of common butterwort makes this heathland plant a fascinating species. Its leaves excrete a sticky fluid that tempts unsuspecting insects to land and become its prey.

Soft brome is a tall, annual grass of roadside verges, waste ground and meadows, and is a 'weed' of arable land. It has long, grey-green leaves and loosely clustered flower spikes.