A perennial, this delicate, trailing plant is native to the British Isles where it is widely distributed; found on heaths, moors and clearings, preferring acid soils. The slender, hairless stems have two raised lines and form roots at nodes.
The light green, opposing leaves are about 10mm long and oval with translucent glands which are noticeable when they are held up to the light.
Flowering is from mid to late summer and the petals are just longer than the sepals. There are many long stamens, which is typical of the genera Hypericum.
This tiny plant is easily uprooted, but is not really a weed, but is included here for identification purposes.