Cretaceous Tulips (Double yellow/orange)

our Cretaceous tulips have come up as well.  They are a tall double tulip (twice the petals).  That vary from yellow to a rich tangerine, both colors darkening as they open (the yellow approaches a light orange).  Stems are 15 to 18 inches, with 1.5 inch heads that spread to about a 4 inch diameter when open.

This last picture shows the variation in color across this variety!