Mature leaves are around 8" to 12". Red leaf margin is consistent. Looks like the photo on page 18 of The Book. Anyone have a confirmed Duncan Macaw? These are rooted cuttings, just coming out of the mistbed.
The first photo in Ricky's first post is not the same as the second photo. The second photo is the croton in question. These are a few photos of the momma plant to help with the ID. Mmmmmmmm