I created this origami Sunflower based on the Daisy flower (2016). It is similar, but the base comes from a hexagon (works with pentagon, heptagon and octagon too, but hexagon is the best in my opinion).
If you don’t have a paper with the proper colors on each side, you can use two sheets: a yellow sheet colored on both sides and a brown sheet (for a 20cmx20cm yellow sheet, use a 10cmx10cm brown sheet of paper). Make all pre-creases and cut them into hexagons. Cover the middle hexagon of the yellow paper with the brown paper before collapsing (11:15). No need to glue!

Origami Sunflower designed by Jo Nakashima (02/2017)
Difficulty level: high intermediate
Diagrams: not available
Suggested paper sizes:
– Sunflower: 20cm x 20cm
– Flowerpot: 15cm x 15cm (tutorial here)