Water Pygmy Weed, Water Pygmyweed: Crassula aquatica (Synonyms: Crassula saginoides, Hydrophila vaillantii, Tillaea angustifolia var. bolanderi, Tillaea aquatica, Tillaea bolanderi, Tillaea drummondii var. bolanderi, Tillaea vaillantii, Tillaestrum aquaticum, Tillaeastrum pringlei, Tillaeastrum vaillantii) -
Sand Pygmy Weed, Sand Pygmyweed: Crassula connata (Synonyms: Crassula connata var. subsimplex, Tillaea erecta) -
Mossy Stonecrop, Shiny Pygmy Weed: Crassula tillaea -