Also called conker tree.

Native to the eastern Mediterranean;  but widely planted as a shade tree. Invasive > in USA

Uses by native peoples
(Ethnobotany database)

On a list as having seeds slightly ☠ poisonous ☠ to humans (all parts of the plant).  Other sources say seeds are slightly ☠ toxic ☠ to horses and humans.

Learn more about 🌰︎ horse chestnut Aesculus hippocastanum

Discover Life Encyclopedia of Life Google Google images Michigan Flora USDA PLANTS db Wikipedia