mock orange
noun
1
: any of a genus (Philadelphus) of ornamental shrubs of which several are widely grown for their showy white flowers and that is either placed in the saxifrage or hydrangea families or in a family (Philadelphaceae) of its own
called also philadelphus, syringa
2
: any of several usually shrubby plants considered to resemble the orange
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Merriam-Webster unabridged
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