Common name:
Square-stalked st john's-wort
Family:
Scientific name:
Hypericum tetrapterum
Main flower color:
Range:
All of the UK except the Scottish Highlands
Height:
Up to 100 cm
Habitat:
Damp grassland, marshes, streambanks
Flowers:
Broad, pale yellow petals, lacking marginal dots, and shorter, narrower sepals, also without dots; in forked clusters at the top of the hairless stems, which are square in cross-section, and winged along the angles. Stems are often red
Leaves:
Opposite, hairless, elliptic to ovate, rounded at the tip, with palmate veins and translucent dots on the surface
Season:
June to September
Rarity:
★★★★★
