mock orange

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various widely cultivated deciduous shrubs of the genus Philadelphus, having white, usually fragrant flowers with four petals and numerous stamens.

from The Century Dictionary.

• noun Any plant of the genus Philadelphus, but especially P. coronarius. Its fragrance in blossom resembles that of orange-flowers. See syringa.
• noun See wild orange, under orange.
• noun Same as calabazilla.
• noun The Victorian laurel, Pittosporum undulatum, a small tree yielding a hard, close-grained whitish wood. In the Azores it is used for protecting orange-trees from the wind. Called also native laurel. See Pittosporum.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun small shrubby deciduous yellowwood tree of south central United States having spines, glossy dark green leaves and an inedible fruit that resembles an orange; its hard orange-colored wood used for bows by Native Americans; frequently planted as boundary hedge
• noun small flowering evergreen tree of southern United States
• noun large hardy shrub with showy and strongly fragrant creamy-white flowers in short terminal racemes
• noun shrubby thorny deciduous tree of southeastern United States with white flowers and small black drupaceous fruit