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Life form:
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herb |
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grass |
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climber |
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shrub |
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tree |
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Additional:
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annual |
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biennial |
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perennial |
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bulbous |
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rhizome |
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aquatic |
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woody |
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Origin:
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Europe and Asia.
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Stem:
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Upright to 1.5m.
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Leaves:
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Upright to 1.5m.
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Flowers:
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Dense, erect panicles with whorls of small, pale green flowers followed by triangular brown nuts.
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Roots:
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Strong tap root.
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Other characteristics:
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Usually a weed of disturbed wetlands.
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Spread:
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By seed and cultivation of roots.
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Control:
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Digging out whole plant, herbicides.
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