To get good photos of the sepals of an open flower, take a photo of the back and or side of the flower. You can also show the outside of the sepals with clear photos of a flower bud, probably easier.
You should also take a photo of the basal leaves. There are now two species with hairy sepals - peltata, with reddish basal leaves, and hookeri with green basal leaves.
You should also take a photo of the basal leaves. There are now two species with hairy sepals - peltata, with reddish basal leaves, and hookeri with green basal leaves.