possibly a mutation in the 'leaf bud' as it was growing. alternatively it is the leaf of another plant growing from seed that has fallen in the base of the stem.

see what others think.

Your question made me curious so I went and looked at mine and found that my plant has both types of leaves, some stalks have both the cut leaf and the plain on the same stalk. The big stalks are normal as this is quite a rampant plant which also seeds itself - or has help from the birds! Is your Mother's plant a young one, it looks small?

Hi both thanks for comments, Honeysuckle it is a smallish plant she had it last year I think from a friend, she also gave me a small one and I also looked at mine yesterday and mine is doing the same too, mine is smaller in a pot at the moment, presume then it is normal for this plant?