1st double row: Skip 2 ch, sc 1 in each of next 2 ch, ch 17, turn, sc 1 in each of 2 ch, sc 1 in top ch of 2 ch.
2nd double row: ch 1, sc 1 in each of next 2 sc, ch 17, turn, sc 1 in each of 2 sc, sc 1 in 1 ch.
Repeat 2nd double row 34 times more. Fasten off.
Pin out loops and press. Coil the straight edge, stitching as you go.
ABBREVIATIONS / REFERENCES
ch(s) = chain(s)
sc = single crochet
Pattern by permission from 100 Flowers to Knit & Crochet by Lesley Stanfield, St. Martin's Griffin, 2009