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CABOMBA, FANWORT

(Cabomba caroliniana, fam. Cabombaceae)

Cabomba caroliniana Cabomba caroliniana Cabomba caroliniana Cabomba caroliniana Cabomba caroliniana

Perennial, rooted aquatic herb with mainly submerged stems up to 10m long; submerged leaves and stems have a thin gelatinous coating. Grows in water 1-3m deep but can grow free-floating if uprooted.

Form or habit: Water plant
Latex:Absent
Leaf:Simple Opposite

Opposite and of two types - submerged leaves repeatedly divided feathery fan-shaped, about 50mm across; floating leaves if present, are entire narrow and up to 20mm long.

Flower conspicuous: Conspicuous
Flower colour: White with yellow centres
Flower description:Daisy-like with 6 white petals and yellow centres, about 20mm in diameter; borne singly above the water surface.
Fruit conspicuous: Unknown
Fruit colour:
Fruit:
Fruit description: Not recorded to fruit and seed in Australia.
Habitat:
Distribution:
Food source for:
Toxicity:No toxicity known
Origin:America
Weed:Yes
Weed status:Declared class 2,Weed of National Significance
Notes:Spread by: Discarded aquarium plants, fragments attached to boats or boat trailers, dislodged stem pieces.
Invades: Creeks, lakes and dams.
Notes: Introduced aquarium plant. Occasional outbreaks identified in this region are controlled. Any suspected sightings should be reported so that identification and eradication can be undertaken.
Can expand rapidly and form dense underwater thickets that impede aquatic recreational activities and endanger swimmers who can become entangled. Destroys habitat and obstructs creeks, affects water quality and increases siltation in lakes.
Five species are recognised but only Cabomba caroliniana is known to be naturalised in Australia. All other species of Cabomba are Class 1 Declared plants in QLD.
Information sources: Mackay Regional Pest Management Group (2011) Weeds of the Mackay Whitsunday Region.

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