Hemianthus micranthemoides

Hemianthus micranthemoides, also known as Micranthemum micranthemoides, pearl grass and pearl weed, is a popular aquatic plant most commonly used in aquascaping. It is very similar to "H. callitrichoides", but has much smaller leaves than the latter. It belongs to the group of aquarium plants commonly known as "pearl weed".
Distribution.
Hemianthus micranthemoides is native to the mid-atlantic region of the United States. It is believed to be extinct in its native range.
In the aquarium.
Hemianthus micranthemoides is a very popular aquarium plant.