mock-orange vs philadelphus

Philadelphus lewisii (Lewis' mock-orange), of western North America 

Pittosporum tobira, native to China, Japan, and Korea, and naturalized and cultivated elsewhere 

Bursaria spinosa (Australian blackthorn) 

especially, Philadelphus coronarius (sweet mock orange), widely cultivated 

Styrax americanus (American snowbell) 

Murraya paniculata (orange jessamine), a small tree ranging from East Asia to Australasia 

Maclura pomifera (Osage orange), of North America 

Pittosporum undulatum (sweet pittosporum), of Australia 

Any of the genus Philadelphus of shrubs.