Tropica Hemianthus callitrichoides - Tissue Culture Dwarf Baby Tears Freshwater Plants In Vitro Tissue Culture 1-2-Grow! Hemianthus callitrichoides "Cuba" Hemianthus callitrichoides is one of the world's smallest aquarium plants. It was originally imported by Holger Windelov, who found it in a riverbed on Cuba, to the west of Havana. Hemianthus callitrichoides is an attractive foreground plant for small as well as large tanks. You will get 1 tissue culture vitro cup of Hemianthus callitrichoides. ( 2.5'' x 2.5'' )