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Plant Form: Perennial woody to fleshy herb.
Size: Usually 30-70 cm tall but can reach 1.2 m.
Stem: Flowering stems upright and woody, non-flowering stems form tangled thickets
Leaves: Opposite pairs on stem, spotted with oil glands clearly visible when held up to light.
Flowers: Star shaped 1-2 cm diameter, bright yellow with 5 petals,
Fruit and Seeds: Sticky 3 cell capsules with numerous tiny golden-brown seeds.
Habitat: Roadsides, farmland, grasslands, riverbanks, railways.
Distinguishing Features: Distinct from other common species. Native St John's wort (Hypericum species) are smaller and with more orange flowers.