The only ref work was to see how many petals and sepals an Oriental Lily has. Otherwise, it's from memory. We have these guys growing in our front lawn garden.
This is the first attempt at making a colored pencil lily art. Prismacolor Premier with colorless blender pencil. It's been reworked a little. Hoping to get better with practice. it was fun to do, and isn't that part of the reason we do art?