Tall melilot was introduced into the UK as a fodder crop, but has now become naturalised. It displays golden, pea-like flowers on tall spikes, which are followed by black, hairy seed pods.

The large, golden flowers of marsh-marigold look like the cups of kings, hence its other name: 'kingcup'. It favours damp spots, like ponds, meadows, marshes, ditches and wet woodlands…

Pineappleweed is an introduced species that has become a widespread 'weed' of disturbed ground, such as pavements and roadsides and gardens. It has feathery leaves and yellow flower…

Planaria are flatworms in the phylum Platyhelminthes with amazing regeneration abilities giving them the title 'immortal under the edge of a knife'. There are many different species that…

Dwarf milkwort is a rare plant of chalk and limestone grasslands with short turf; it can mainly be found in Kent, Yorkshire and Cumbria. It has bluish, sometimes pink, flowers atop its short stems…

Common cow-wheat is a delicate annual that brightens up the edges of acid woodland and heaths with deep golden flowers in the summer.

Look for the small, pink, pea-shaped flowers of Common restharrow on chalk and limestone grasslands, and in coastal areas, during summer.

The umbrella-like clusters of white, frothy flowers of cow parsley are a familiar sight along roadsides, hedgerows and woodland edges.

Enchanter's nightshade is a hairy plant, with rounded leaves that taper to a fine tip, and clusters of small, pinky-white flowers in summer.

Herb-robert is a low-growing plant, with small, pretty, pink flowers. Look for it in shady spots in woodland, hedgerows and coastal areas.

Look for the deep magenta, star-shaped flowers of Marsh cinquefoil in marshes, bogs, fens and wetlands in the north, west and east of the UK.