> 
>  Whereas the stalks are reasonably safe to eat, theroots and leaves are considered to at times contain dangerously highconcentrations of oxalic acid.  

The case about rhubarb has made me think about other plants and how the stalks are fine with less oxalic acid and the leaves can kill you.  I wonder if the chemicals (any) that we put in the soil or on the seeds might go into the leaves and not the fruit or vegetable.
Billy Bee
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