Bacopa Caroliniana

Bacopa Caroliniana (Bacopa caroliniana) is an aquatic plant in the family Plantaginaceae. It is native to Southeastern USA. Bacopa caroliniana smells of lemon when you crush a leaf, which is a strange property for an aquarium plant and a reliable way to identify it. It is a thick-stemmed, slow-growing upright with rounded leaves in opposite pairs, and it is among the most forgiving stems in the hobby — it tolerates hard water, moderate light and no CO2 without complaint, where most red stems would sulk. It is native to the south-eastern United States, reaches around 30 cm, and grows at 22 to 28 °C (72–82 °F) across a wide hardness range of 4 to 16 dGH. Under strong light the tops take on a copper-bronze flush. Propagate by cutting and replanting; it roots readily from the stem.