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  • Trapa natans

      Notifiable organism
    • Water chestnut, floating water chestnut

    • Scientific Name: Trapa natans
    • Origin: Asia, Europe, Africa
    • Type: Weed
    • Plant Life-form Type: Floating-leaved
    • Taxonomy: L.
    • Presence: Not known to be in NZ
    • Habitat: Lakes, ponds, canals and slow moving water.
    • Notes: Potentially a major weed in New Zealand
    • Propagation: Plant fragments and seed set
    • Features: Plants have toothed diamond shaped upper leafs that float on the water surface forming a rosette. They are arragned on spongey/swollen stalks. The stems give rise to long, narrow or feather like underwater laves and are rooted in the sediment. The fruit is a large (2.5 cm) hard, woody nut with spines (2 to 4) that are sharp.
    • Source: TIFBIS
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