They say this is a very old cultivar. It also go by the names, 'Palmatifidium' and/or 'Eagles Claw'. I've been growing this one in full sun and it does very well. Full sun seems to give it the best color, imo.
Summer 2023 update. Repotted it this spring and it loves it. It has put on a out of growth. I also have kept it in a shaded area so far.