Feather and Fan:
Done over a multiple of 18 sts.
Row 1: K
Row 2: P
Row 3: *K 2 tog 3 times, YO, K1 6 times, K 2 tog 3 times* repeat to border.
Row 4: K
Repeat these rows until desired length. The larger the needle size relative to the gauge of yarn, the lacier the effect. See both examples.