this is a philodendron leaf.
With this leaf, and sweeping lines, you come down from the top, make your heart, come back out and go back to your loop-de-loop toward your next leaf/heart ...
you will be amazed at how wide and deep you can make them, you will enjoy how wistful you can make them ... just take a gander at some leaves from different plants, and you might find lots of samples to practice. <wave>