Hawaii's Most Invasive Horticultural Plants

mock orange
Philadelphus karwinskyanus

[ Sorry, no photo! If you have one we may use, please e-mail info to fkraus@hawaii.edu ]

Other names:philadelphus, syringa
Description: Sprawling shrub to 16' tall, with scrambling stems, opposite 1-3" hairy leaves, and terminal clusters of 1" white flowers with numerous yellow stamens; fruits not seen.
Risk areas: Open moist and wet areas from 3000-5000 ft. elevation.
WARNING:The stems of this species root where they touch the ground, and one shrub soon gives rise to a thicket capable of covering trees or hillsides.

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