Morphological studies on Sri Lanka's aquatic plants revealed plants that differ in their characteristics from all other known Aponogeton species. These plants were described in 2016 under the name Aponogeton dassanayakei.
Characteristic of this new Aponogeton is that the plants can form white inflorescences or stems with young plants. They differed from Aponogeton undulatus in that they lacked the square patterns of translucent areas in the leaves, and that they do not form floating leaves.
Aponogeton dassanayakei grows in the lowlands of Sri Lanka in slow-flowing waters at depths of 1 to 2 meters and even below. The habitat reaches into the brackish water areas of the coastal rivers.
The first description of this species can be found here: