Lysimachia hybrida, commonly known as Mississippi Loosestrife or Lowland Yellow Loosestrife, is a perennial herb that is native to wetland areas such as marshes, swamps, wet meadows, and stream banks across much of the United States and Canada, excluding the deserts in the west and the Arctic and sub-Arctic regions. This plant typically grows to a height of 1-3 feet (0.3-0.9 meters) and spreads 1-2 feet (0.3-0.6 meters). It features lance-shaped leaves and produces small, star-shaped yellow flowers from early to mid-summer, which are moderately showy and attract pollinators.

Mississippi Loosestrife is valued for its ability to thrive in wet conditions and is often used in rain gardens, water features, and naturalized areas. It is also appreciated for its ease of maintenance and its role in supporting wildlife, such as providing nectar for bees. In cultivation, it requires consistently moist soil and can tolerate partial shade to full sun. While it is not particularly prone to diseases, it can spread aggressively in ideal conditions, potentially crowding out other plants. Gardeners should be cautious of its invasive potential outside its native range and consult local regulations before planting.CC BY-SA 4.0