Latin Name: Lysimachia punctata

Flower: Bright yellow, star-shaped flowers that bloom in dense clusters along the stems from midsummer through early fall.

Leaves: Opposite or whorled, lance-shaped, and smooth-edged with a slight hairiness. Unlike Garden loosestrife, there are no “dots” on the underside of the leaves.

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 through both seeds and rhizomes, forming dense clumps or colonies. It often spreads rapidly in moist environments, creating large patches of bright yellow flowers. In situ, yellow loosestrife appears as tall, dense stands of yellow-flowered plants along wetland edges and in moist gardens.