What are some medicine plants in the Daintree Rainforest?

Here you can read about the flora in the Daintree Rainforest, Australia: http://www.daintreerainforest.com/flora.html. They say on this site, that the Daintree rainforest is home to one of the highest populations of primitive flowering plants in the world. These ancient plant families may hold secrets to a number of unanswered questions regarding the origins of the flowering plants - plants on which the human race depends for food and medicines.
In the Daintree Rainforest many of the plants are deadly poisonous. Medicine plants are often poisonous if wrongly used. There are also plants that are harmful when touched.