The Parasol stitch is a vertical lace stitch pattern that resembles parasols. The pattern is worked over 17 stitches on a background of stockinette stitch.

Cast on a multiple of 18 sts,  + 1
Row 1 - right side: K1, * yo, k1 (p3, k1) 4 times, yo, k1; rep from * to end.
Row 2 and all wrong side rows: Purl all sts.
Row 3: K1, * k1, yo, k1, (p3, k1) 4 times, yo, k2; rep from * to end.
Row 5: K1, * k2, yo, k1 (p3, k1) 4 times, yo, k3; rep from * to end.
Row 7: K1, * k3, yo, k1 (p2tog, p1, k1) 4 times, yo, k4; rep from * to end.
Row 9: K1, * k4, yo, k1 (p2tog, k1) 4 times, yo, k5; rep from * to end.
Row 11: K1, * k5, yo, k1 (S2KP, k1) twice, yo, k6; rep from * to end.
Row 12: Purl all sts.

Knitting abbreviations:
Knit: K | Purl: P | Yarn over: Yo | Knit 2 sts together: K2tog | Slip slip knit: Ssk.
S2KP: Sl2tog-k1-p2sso. Slip 2 stitches together as if to knit 2 stitches together, knit1, pass the slip stitches one at a time over the stitch just knitted and drop them: Sl2tog-k1-p2sso.