Here is a crochet flower for a hat or headband. It is a layered flower that takes very little yarn to make. The leaves are also very simple to crochet!

This crochet flower starts off with making a base of loops. Then each layer is made in a different color yarn (or you can use the same color). The loops are used to make the petals.

The leaf is made of several basic crochet stitches worked on one side of the starting chain, and then along the other side. Then some surface crochet is used to create a chain like look along the middle section.

There is a step-by-step tutorial video for this pattern.