Hemianthus callitrichoides is one of the smallest aquarium plants in the world, and creeps over the bottom with millimetre-sized round leaves. If planted in small clumps a few centimetres apart, it will spread rapidly and cover the bottom like a carpet. Hemianthus callitrichoides is an attractive foreground plant for small aquariums. Found on Cuba west of Havana.

Referred to in the hobby as Hydroctyle sp Japan, its true name is Hydrocotyle tripartita and it originates from South East Asia. The leaves are small and presents a brilliant green colour in your aquarium.