Anubias barteri var. nana on lava stone.

Anubias barteri var. nana is a small, attractive plant which thrives in all conditions. It originates from Cameroon and will reach 5-10 cm height. The rhizome will be 10-15 cm or more. It grows slowly, and the leaves survive for several years, giving slow-growing algae the chance to become established. The best result is achieved by planting on a stone or tree root. If planted on the bottom the rhizome must not be covered because it tends to rot. 

It flowers frequently under water and will thrive in shady places, where other plants will not. It is not eaten by herbivorous fish.