Pignut Hickory - Carya glabra

Leaves were serrated, dark green with 5 shiny leaflets. The fruits were green (unripe). When they ripen, they will be brown and have thin husks.

Habitat: Growing on a nature preserve along the Hudson River in upstate New York. The location where the preserve is used to be a huge ice harvesting area where 10,000 tons of ice used to be harvested from the river every year.