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Hawaii's Most Invasive Horticultural Plants |
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Hawaii's Most Invasive Horticultural Plants |
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 (Photo credit: Gerald D. Carr) |
| Other names: | Pennisetum ruppelii |
| Description: | Tufted perennial grass up to 3 ft. tall, with wiry leaves and pink to purple flower heads up to 1' long. |
| Risk areas: | Dry forest, roadsides, grasslands, lava fields. |
| WARNING: | Related species of Pennisetum have proven invasive elsewhere and should probably be avoided too. |