Cushions of clover-like, pink Thrift are a familiar sight of cliffs, shingle beaches and sand dunes around the UK. Also known as 'Cliff Clover', it makes a good garden plant.

An introduced species, Common evening-primrose is now naturalised on waste ground, roadside verges and railway cuttings. It has long been used to produce the herbal remedy, evening-primrose oil.…

Fennel has feathery leaves and open, umbels of yellow flowers. It was probably introduced by the Romans for culinary use, and is now a naturalised species of verges, waste ground and sand dunes.…

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…

The Lawson cypress is a large, conical-shaped, evergreen tree that has been introduced into the UK and widely planted in gardens and parks. It has also naturalised along damp banks and woodland…

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.

Caddisflies are a large order of insects that can be found in all kinds of wetlands. The larvae are known for making cases to pupate in, gathering stones, sand and leaves, and wrapping them with…

The common polypody is a hardy fern of damp, shady places in woodlands. It also makes a good garden fern. It has ladder-like, leathery foliage with pimply undersides - these spots are the spores…