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Asked by pkgargdolic1965 | 30th Dec, 2009, 08:19: AM

Expert Answer:

Water hyacinths are the only large aquatic herb that can float on the water unattached to the bottom. They float on bloated air-filled hollow leaf stalks. The leaves of free-floating water hyacinths are characterised by a bulbous swelling in a section of the petiole which provides buoyancy.

Answered by  | 30th Dec, 2009, 05:20: PM

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