OBJECTIVE
Although many highly successful weed species use a ballistic seed dispersal mechanism, little is known about the mechanics of this process. Bittercress (Cardamine hirsuta) siliques are morphologically similar to Arabidopsis siliques, but they can project their seeds up to 5 m, while
Seeds are dispersed by explosive coiling of the fruit valves in Cardamine hirsuta. This rapid coiling launches the small seeds on ballistic trajectories to spread over a 2-metre radius around the parent plant. The seed surface interacts with both the coiling fruit valve during launch
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