Ground-elder was likely introduced into the UK by the Romans and has since become naturalised. A medium-sized umbellifer, it is an invasive weed of shady places, gardens and roadsides.

Sphagnum mosses carpet the ground with colour on our marshes, heaths and moors. They play a vital role in the creation of peat bogs: by storing water in their spongy forms, they prevent the decay…

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…

Water-cress has become so popular as a salad addition that it is now cultivated on a wide scale. In the wild, it grows in shallow, fast-flowing streams and is an indicator of clean water.

Buddleia is a familiar shrub, well-known for its attractiveness to butterflies. It is actually an introduced species, however, that has become naturalised on waste ground, railway cuttings and in…

Sand sedge is an important feature of our coastal sand dunes, helping to stabilise the dunes, which allows them to grow up and become colonised by other species.

A climbing plant of woodlands, hedgerows, riverbanks and gardens, Hedge bindweed can become a pest in some places. It has large, trumpet-shaped, white flowers and arrow-shaped leaves.

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.

The Hybrid black poplar is a variety of our wild Black poplar that can be seen along riversides, roadsides and in parks. Used for ornamental planting and timber, it has become naturalised in the…

Ivy-leaved toadflax is an introduced species in the UK that has become widely naturalised. Look for creeping along old walls and pavements, and shingle beaches. Its flowers resemble those of…