Rotala sp. "Ceylon" is a fast growing, hardy, and easy to grow stem plant
It is light green in color, however, under strong light it can develope a pinkish color
When compare to Rotala Green, this plant has thiner leaves and stems and gives an overall "lighter" weight impression. 
In aquascaping, this is a great "neutral" plant to use in the background and accentuates and compliments well with focal or red plants.