Perforate St John's wort Hypericum perforatum

Best time to see: Jul to mid Sep

Key facts

Tallish perennial with branching stalks of bright yellow five-petalled flowers, with black dots

Found in rough grassland and scrubby areas and on woodland margins

Extras

The commonest of a number of similar species, including hairy found in woods, and square-stalked in damp ground

Oval leaves have translucent dots which are tiny resin glands, giving the plant its foxy smell; stems have two wings