Hypericum humifusum is a prostrate flowering plant in the St. John's wort family Hypericaceae commonly known as trailing St John's-wort.

The thin trailing stems have two raised lines and bear opposite pairs of pale green elongated oval leaves, often with tiny translucent glands.

The undersides of the leaves have tiny black dots on the edges.

[2][3] Hypericum humifusum grows on heaths, dry banks, bare land at the edge of tracks and light woodland.

[2] It is found in Western Europe [4] and throughout the British Isles where it flowers from May to September.