I don't think they're those kind of roots. It isn't a plant that forms soil type roots. Those would be just water type roots.. more like absorbing feelers. Besides, you can plant it anyway without roots.
Take a common pothos for example. When you take cuttings and put them in water, they grow roots. But those are long, skinny, flexible, nearly white colored roots. If you then plant it, the "water" roots go away and the plant forms an entirely different root system that's thicker, more rigid, and darker in color... these are the soil type roots.
Getting back to aquatic floaters. Those soft anachris roots aren't going to anchor the plant, hold it upright, or draw anything from a soil substrate. If it starts looking stringy, you can even clip them off. It wouldn't matter.
