Square-stalked St John's-wort

Square-stalked St John's-wort in wet
grassland by a stream, West Dorset

Flower showing stamens

3 styles and anthers - some with black dots

Flowers from below - lanceolate sepals and
petals and sepals without black markings

Flowers and fruits

Berry-like capsules with remains of styles

Opposite leaves

Under-side of leaf held up to the light.
Veins, dark spots and translucent spots

Stems - square and winged and with red markings