- Caoutchouc (Rubber tree, white rubber vine). Caoutchouc is the precursor to what we know as natural rubber or natural latex.
- Chicle (Sapodilla tree). Chicle is the forerunner to chewing gum, and is still used as such in some chewing gum brands and in other cultures.
- Guayule (Guayule)
- Gutta-percha (Gutta-percha tree). Gutta-percha is very similar to caoutchouc, but is more brittle.
- Upas (Upas tree). Upas is famed for its use to coat the tips of poisoned arrows. Needless to say, it is highly toxic.
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