Helanthium tenellum ‘Micro’ is a cultivar of Helanthium tenellum, a species from the Alismataceae family, native to South America. This variety is characterized by its compact size and narrow leaves, making it an excellent choice for small aquariums or as a foreground plant in larger aquascapes. The leaves of H. tenellum ‘Micro’ are significantly smaller than the standard H. tenellum, typically reaching 2–5 cm (1–2 inches) in length. The plant forms a dense rosette from its rhizome, with leaves that are light green and slender, providing a fine texture and delicate appearance in aquascapes.