A tree’s cannonballsSourced
Its round fruit turns blue inside
Native to Central and South America, the cannonball tree bears round fruit with woody shells, reaching about 25 centimetres across. That shape explains its common name. The white pulp turns blue when exposed to air through oxidation.
The surprise continues beyond the shell.
Summary / translation: Unbubly · CC BY-SA 4.0
Source and reuse details
Couroupita guianensis · Wikimedia contributors
Adapted, summarized and translated from the source. Adapted text is also available under CC BY-SA 4.0.
Reviewed: 2026-10-10