Look for Water avens in damp habitats, such as riversides, wet woodlands and wet meadows. It has nodding, purple-and-orange flowers that hang on delicate, purple 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.

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.

The papery, translucent, silver 'coins' of Honesty are instantly recognisable. They are actually the leftover seed pods that dangle from the plant through winter.

Once considered a weed of cornfields, the Pheasant's-eye was nearly wiped out by intensive agricultural practices. Today, it can be found in deliberately seeded areas, and on roadside verges…