Adaptations for dispersal
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The ability to produce offspring which may establish some distance from the parent plant is a characteristic of fundamental importance to all plants; especially those colonising new areas. Mechanisms include wind dispersal of seeds (e.g. with a parachute-like pappus), dispersal of floating fruit in water, movement of hooked fruit by attachment to animals and equipment (See Table).

 

Dispersal mechanisms of some common weeds 
Species Dispersal structure Medium
Dandelion (Taraxacum officinale) Parachute-like pappus Wind
Hard rush (Juncus inflexus) Floating fruit Water
Morning glory (Ipomoea sp. ) Floating fruit Water
Cleavers (Galium aparine) Hooked fruit Animal
Sensitive plant (Mimosa pigra) Hooked fruit Animal
Noogoora burr (Xanthium pungens) Hooked fruit Animal
Wild oat (Avena fatua) Awned fruit Equipment

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Steve Adkins