Double or a Quad?

Our daughter has these Irises growing in one of her flower beds. They look different from regular Irises and I'm not sure if they are double or quadruple Irises or a different type.

[Cathy]

An explosion of color! Wow!

[Babs]

How beautiful.

[Ian JB]

So vivid colours. wonderful image.

[Diana]

Stunning

[*lynn]

Wow!

[Merrelyn]

Beautiful.

[KV]

Lovely.

[haskar]

Amazing

[Kathy]

This is certainly full petaled and full of color.