Representative examples — Species: Ambrosia trifida var. trifida
Ambrosia trifida var. texana.jpgAmbrosia trifida var. texana - 54076001178.jpgAmbrosia trifida var. texana - 54076198350.jpgInterstate medical journal (1917) (14597080968).jpgMemoirs of the American Entomological Society (1972) (14779060911).jpg