Interestingly, tree sap is long gone from the current treat.

CNN: Chew on this: Gum may be good for body, mind

This is the period of time that the cicada nymphs remain underground, feeding on sap from tree roots until their biological alarm-clocks go off.

ECONOMIST: The 17-year cicadas are about to emerge in force

Native Americans introduced the sap of the spruce tree to early European settlers in New England.

CNN: Chew on this: Gum may be good for body, mind

Mayans chewed on the sap of the sapodilla tree and called it chicle.

CNN: Chew on this: Gum may be good for body, mind

Pondering the situation, he ordered one of the farmworkers to find a really thick piece of leather and to collect sticky mango sap from a nearby tree.

NEWYORKER: Nawabdin Electrician

Unlike other gums that contain petrochemicals the natural gum is produced from the sap of the chicozapote tree found in the Mexican rainforest, a spokesman for Chicza told CNN.

CNN: New gum could mean sticky end for mess

The first step is figuring out how much sap can be extracted from the average birch tree in the Northeast using modern practices, she said.

WSJ: Birch syrup explored as add-on to maple industry