Latin Name: Lysimachia vulgaris

Flower: Bright yellow, star-shaped flowers in dense clusters at the tops of stems, blooming from midsummer through early fall.

Leaves: Opposite or whorled, lance-shaped leaves that are smooth and dark green and dotted with black or orange glands on the underside.

Stems: Erect, unbranched, and slightly hairy, growing up to 1.5 meters tall.

Growing Environment: Prefers moist, well-drained soils in wetlands, gardens, and along streambanks.

Growth Habit: A perennial herb that spreads aggressively through both seeds and rhizomes. It forms dense clumps or colonies, often in moist habitats. In situ, garden yellow loosestrife appears as tall, bright, yellow-flowered stands, often forming large patches in wetlands or near water bodies.