Bacopa caroliniana, known as Lemon Bacopa, is a hardy, low-maintenance aquatic plant with thick, waxy, oval-shaped leaves that release a distinctive lemon-like scent when crushed. This versatile, slow-growing stem plant is popular in the aquarium hobby for adding vertical interest as a background or midground plant. It features an upright growth habit and develops vibrant green foliage that can turn reddish-pink under high light, thriving in various water conditions and temperatures.