Claim: Tetrachyron is a genus of plant belonging to the Heliantheae tribe of the Asteraceae family.
Evidence: Asteraceae Family: Tribe: Heliantheae Tetrachyron
Schltdl. Genus: 
Tetrachyron is a genus of Mesoamerican plants in the sunflower tribe within the daisy family. Heliantheae Tribe: Asteraceae Family: