| 1 | They also planted rubber trees, and heliconium flowers. | |
| 2 | In Southeast Asia, rubber trees now occupy huge swathes of land; | |
| 3 | Latex, a material obtained from rubber trees, is a natural polymer of isoprene. | |
| 4 | Also known as weeping fig, benjamin tree, or small-leaved rubber plants, all ficus have milky sap in their leaves and stems that is toxic. | |
| 5 | Some latexes occur naturally in the cells of plants such as chicle and rubber trees. |