Bulliarda aquaticaHydrophylla aquaticaTillaea angustifoliaTillaea aquaticaTillaea ascendensTillaeastrum aquaticum Crassula aquatica is a succulent plant known by the common names water pygmyweed,[2] common pygmyweed[citation needed] and just pigmyweed.

[3] It is an annual plant of salt marshes, vernal pools, wetlands, and other fresh to brackish water bodies.

Crassula aquatica is a small plant forming thin mats or small patches on mud and sand, and growing more erect when exposed to open air for longer periods.

[citation needed] A flower grows on a short stalk from the intersection of each oppositely-arranged pair of leaves.

[citation needed] It is an annual plant of salt marshes, vernal pools, wetlands, and other fresh to brackish water bodies.