Helanthium (Bentham & Hooker f.) Engelmann ex J.G. Smith. Dwarf-burhead.
A genus of 2-9 species, annual and perennial herbs. Lehtonen & Myllys (2008) conducted a cladistic analysis of morphological and molecular data of Echinodorus and related genera and determined that Helanthium should be separated at the generic level.
Ref: Haynes & Hellquist (2000a) In Flora of North America Editorial Committee (2000); Haynes, Les, & Holm-Nielsen In Kubitzki (1998b); Lehtonen & Myllys (2008). Show full citations.