Newtown Pippin
This is an old, well-established American variety but not widely grown today because the tree is awkward to manage.
The apple was named after the town of Newtown which stood on Long Island where Flushing now stands.
The original tree was found there around 1700 but perished in 1805 after excessive cuttings were taken for propogation. The tree was unrivaled as an apple producer but very sensitive to soil and climate conditions and thus it lost its popularity among growers toward the end of the 19th century.
This variety produced a heavy crop of yellowish-green apples which were crisp but juicy, acidic but sweet, and with exceptional keeping qualities.
Ripening in midwinter, they will keep until the following summer.