The leaves of mint bacopa are thick, succulent, and oblanceolate, arranged in opposite pairs. Each leaf measures approximately 1/8 inch (0.3 cm) in width and 5/8 inch (1.6 cm) in length. They are oblong, fleshy, and densively arranged along short, ascending stems. When crushed, these leaves release a distinctive lemon-like scent, a unique characteristic. Their texture is smooth and waxy, enhancing their water retention capability.

The flowers of mint bacopa are small and light blue, featuring 4-5 obovate petals arranged symmetrically. Each petal measures approximately 0.2 inches (5mm) in length, creating a delicate and appealing bloom. These flowers typically emerge from May to September, giving the plant an extended blooming period. The distinct light blue hue and the singular arrangement of the petals are key characteristics that make the flowers of mint bacopa identifiable to both novice and experienced plant enthusiasts.

Mint bacopa features green stems that can adapt to both aquatic and terrestrial environments. When growing out of the water, the stems exhibit fine hairs, adding to their textured appearance. Conversely, stems submerged in water are completely hairless, presenting a smooth texture. These stems typically range from 0.1 to 0.2 inches (2.5 to 5 mm) in thickness. The branching pattern is generally opposite, contributing to a dense, bushy growth habit that can aid in identification.

The fruit of mint bacopa is an egg-shaped capsule that emerges smooth and hairless. Typically, the fruits develop over the summer months from July through October. These capsules, although diminutive in size, embody the quintessential traits of the mint bacopa's reproductive process. In terms of color, the capsules often bear a subtle green hue that may mature further as the season progresses. The streamlined form of the capsule, coupled with its smooth texture, grants an elegant simplicity to its aesthetic, making identification accessible even to those newly acquainted with botany.