Why is the Scottish poppy different?

Thank you to Forces News for this piece that explains the reasons behind the difference.

What differences are there? 

When the Edinburgh-based factory that makes the Scottish poppy was set up in 1926, the look of the poppy was redesigned for sale north of the border.

The two-petal poppy, still sold in England, Wales and Northern Ireland to this day, has a leaf attached, something charity Poppyscotland says is botanically incorrect.

The distinctive Scottish poppy - a four-petal poppy made from vibrant red, crimped paper - was designed by Lady Haig.

More information here.