Look up Helianthus or helianthus in Wiktionary, the free dictionary.
Helianthus is a genus of plants comprising sunflowers.
Helianthus may also refer to:
- USS Helianthus (SP-585), U.S. Navy patrol boat
- Helianthus III, a yacht listed on the National Register of Historic Places
- Heliaster helianthus, a species of starfish
- Stichodactyla helianthus, a species of sea anemone