An uncommon hedgerow and woodland tree of central and eastern England, purging buckthorn displays yellow-green flowers in spring, and poisonous, black berries in autumn.

The fine, downcurved bill of the treecreeper makes this tit-sized bird unmistakeable. Look out for it in woodlands and parks, literally 'creeping' around tree trunks.

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.

An uncommon tree of wet woodlands, riverbanks and heathlands, alder buckthorn displays pale green flowers in spring, and red berries that turn purple in autumn.

This dainty white butterfly is now only found in a few parts of Britain, where it flutters slowly through woodland clearings.

As its name suggests, the scarlet elfcup is a bright red, cup-shaped fungus. It is widespread, but scarce, and can be found on fallen twigs and branches, in shady, damp places.

A scarce tree of central and southern England, in particular, the small-leaved lime can be found in ancient woodland. It is has sweet-smelling flowers in summer and nut-like fruits in autumn.

The wayfaring-tree is a small tree of hedgerows, woods, scrub and downland. It displays creamy-white flowers in spring and red berries in autumn, which ripen to black and are very poisonous.