St. John's wort

Family: Clusiaceae
Scientific name: Hypericum perforatum
Description: 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.

Example images for this weed