What does the reader learn about poisons based on "medicinal plants of the rain forests

The readers get to know that not every plants that seem harmless are actually harmless.

Explanation:

Rainforest are basically forests which are spreaded across acres and which faces high rainfall almost throughout the year.

If we talk about the poisonous medicinal plants of rainforest, there are innumerable plants in the forest and most of those plants might seem quite harmless but that must not be the case.

Some of the most deadliest and toxic plants include the Water Hemlock, White snakeroot, Castor bean, Tobacco and many such other toxic plants which can be found in rainforest all over the world.