This plant is a variant of Ludwigia inclinata var. verticillata, with spiralling submerged leaves growing very densely. It is probably a mutant of L. inclinata var. verticillata ‘Cuba’ that was found in a Vietnamese aquatic plant nursery.
Dwarf Sagittaria is a perennial plant species with height up to 10 – 15 cm (about 4 – 6 inches). They possess bright green foliage that has narrowly linear, arrow-shaped to ovate / oval in form. Leaves are generally stiff, short, and 1mm to 7mm wide.