Which genus of plants is within the Asteraceae family, Tithonia or Hymenocallis?
Hymenocallis Hymenocallis (US) or (UK) is a genus of American plants in the amaryllis family.
Hymenocardia Hymenocardia is a genus of trees in the family Phyllanthaceae first described as a genus in 1836. Most of the species are native to Africa, with one in Southeast Asia.