The open shell and picot stitch in crochet cotton thread.

Multiple of 7 sts
(add 1 for base chain)

1st row (right side): 1sc into 2nd ch from hook, *skip 2ch, work a Shell [1dc, 1ch, 1dc, 1ch, 1dc] into next ch, skip 2ch, 1sc into next ch **, 3 ch, 1 sc into next ch; rep from * ending last rep at ** in last ch, turn.
2nd row: 7ch (count as 1tr and 3ch), *work a Picot (1sc, 3ch, 1sc) into center dc of next Shell, 3ch**, 1dc into next 3ch arch, rep from * ending last rep at **, 1tr into last sc, skip tch, turn.
3rd row: 1ch, 1sc into first st, *skip next 3ch sp**, Picot into next dc; rep from * ending last rep at **, 1 sc into next ch of tch, turn.
Rep 2nd aad 3rd rows for pattern.