'Reni' is a well-known cultivar characterized by being easy to grow and amongst the smallest of the red Echinodorus, 15-40 cm tall and a roset from 15-25 wide.

The new leaves of the plant are reddish-brown to deep beetroot in colour. It can be used in small aquariums and is unpretentious. The plant requires a lot of light and nourishment for optimal colour development.