Three pics of a young sycamore growing in my garden. (Won't be there long....it's destined to become a walking stick!)
First pic is looking at the leaf 'as normal'.
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Second one is looking from below, through the leaf.
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And this last one is with the sun on the under side. Obviously a Purple Sycamore.
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We have a red leaved sycamore in our garden, it produces lots of seedlings, I will send you another if you want. They make good bean sticks if you miss weeding one out.
Though only one of the children has ever had as red leaves as the mother plant.