41. The Zamiaceae are perennial, evergreen, and dioecious . 42. Most trematodes are hermaphroditic, but members of the family Schistosomatidae are dioecious . 43. Holly is dioecious , meaning that there are male plants and female plants. 44. The dioecious , producing cones of only one sex. 45. It is a dioecious liana climbing to 10 m on rainforest tree species. 46. Some species are dioecious , with plants having either male or female flowers. 47. They are generally dioecious , with male and female flowers on different plants. 48. The species is dioecious , meaning individual plants are either male or female. 49. The plant is dioecious , with individuals bearing either male or female flowers. 50. The dioecious , with male and female flowers occurring on separate individual plants.