Seeds of Trichosanthes lepiniana. Trichosanthes, a genus of family Cucurbitaceae, is an annual or perennial herb distributed in tropical Asia and Australia. The plants in Cucurbitaceae family is composed of about 110 genera and 640 species. The most important genera are Cucurbita, Cucumis, Ecballium, Citrullus, Luffa, Bryonia, Momordica, Trichosanthes, etc