Kidney-leaf Mud Plantain, or Heteranthera reniformis, is recognized by its broad, rounded, kidney-shaped leaves held on slender stalks above shallow water or muddy substrates. This plant thrives along marsh edges, floodplains, and seasonally wet soils across the Americas. Heteranthera reniformis produces delicate flowers on emergent stems, though its foliage is often the dominant visual feature. It spreads through creeping rhizomes, enabling it to form patches in soft, moist environments.

A noteworthy trait of Heteranthera reniformis is its ability to withstand fluctuating water levels, shifting between semi-aquatic and emergent states. The plant provides shade and structure in shallow wetlands and helps stabilize soil. Although modest in size, Heteranthera reniformis plays a functional ecological role in the dynamic margins of freshwater systems.