Hogweed comes in a red stemmed version which could look like Rhubarb. Mind there is an easy way to tell, pull a stalk and smell it, nothing but Rhubabrb smells like Rhubarb.
Rhubarb does not come in a 'wild' variety. It is either something else and should be avoided or has grown from a thrown-out crown, maybe in an abandoned garden.
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Rhubarb is rhubarb wherever it's growing. As long as you're sure it's rhubarb. Though can't think of anything that could be mistaken for it.
In the sticks near Peterborough
Great, thank you!
Hogweed comes in a red stemmed version which could look like Rhubarb. Mind there is an easy way to tell, pull a stalk and smell it, nothing but Rhubabrb smells like Rhubarb.
Rhubarb does not come in a 'wild' variety. It is either something else and should be avoided or has grown from a thrown-out crown, maybe in an abandoned garden.
Chucked out plants must be the origin of a lot of 'wild' plants
In the sticks near Peterborough
I have known some people mistake burdock for rhubarb http://www.ediblewildfood.com/burdock.aspx
it is edible, but it's not rhubarb.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
I can't imagine mistaking anything for rhubarb. You'd only need to scratch a stem and sniff.
In the sticks near Peterborough
Ah, but I wasn't suggesting that you would mistake it Nut
, but I have known it happen 
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.