Neobeckia aquatica and Armoracia lacustris), the lakecress or lake cress, is a species of freshwater aquatic flowering plant in the family Brassicaceae.

[2] It is found in eastern and central North America, generally in the Great Lakes and Mississippi watersheds.

[1] A submerged perennial, it has emergent flowering branches.

[3] It is typically found in slow-moving water, such as oxbow lakes.

It is used as a foreground aquarium plant, as it is undemanding and very slow-growing.