Most importantly this is a pretty plant, just look at the photos and you can see that. The rest of this may just be confusion!
A plant of mysterious origins; Mulford Foster said it was a hybrid of marmorata x spectabilis and others have said it is a hybrid from France. Harry Luther of the BIC said it could be the straight species marmorata.
At any rate it is a light chartreuse green plant with red mottling and red ‘fingernail’ tips. A beauty that is cold hardy in zone 9 and popular in landscapes.