The fruit of this tree.
The tree Maclura pomifera, noted for its large, dense, wrinkly, bright green and unpalatable fruit, once a popular hedge tree in the United States.
Bursaria spinosa (Australian blackthorn), a small tree from Australia.
Murraya paniculata (orange jessamine), a small tree ranging from East Asia to Australasia.
Choisya ternata (Mexican orange), an aromatic shrub native to North America.
Maclura pomifera (Osage orange), a small tree from North America.
Any shrub of the genus Philadelphus, particularly Philadelphus coronarius (sweet mock orange).
Pittosporum undulatum (sweet pittosporum), a small tree native to Australia.