Hawaii's Most Invasive Horticultural Plants

   
Formosan koa
Acacia confusa

(Photo credit: Gerald D. Carr)

 

(Photo credit: Gerald D. Carr)


Description: Tree up to 50' tall, similar in appearance to koa, but the flowers are yellow and the phyllodes ("leaves") are straighter and not so sickle-shaped.
Risk areas: Dry to moist disturbed areas, grasslands.

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