a. Habit herbaceous of Heterosperma ovatifolium. b. Leaf. c. Head enclosed by foliaceus bracts. d. Head with outer involucral bracts with margin setose. e. Head with cypselae f. Ray cypsela (left) and disc cypsela (right). (photographs by: a. M. Alves; b-e. R.F. Almeida; f. M.L. Barbosa).