Techniques used in this stitch (British term / American term):

Chain stitch – ch

Slip stitch – sl.st

Double crochet / Single crochet – dc/sc

Half treble / Half Double crochet – h.tr / h.dc

Treble / Double crochet – tr / dc

Double treble / Treble – d.tr /tr

4 – Half tr / half dc puff stitch - puff.st

Stitch - st

Big flower

Part 1.

Round 1: make 4 ch, 11 tr/dc in last ch, sl.st in 4th ch.

Round 2.

Making 1st petal.

Row 1: 3 ch, 1tr/dc in the same st, 2 tr/dc in next st, turn.

Row 2: 3ch, 2 tr/dc in last tr/dc of row below, 3 tr/dc in next st, 3tr/dc in next st, 3 tr/dc in 3rd ch, turn.

Row 3: 2 ch, 1dc/sc in each of next 10tr/dc below, 1 dc/sc in 3rd ch, turn.

Row 4: 4ch, * 1tr/dc in next st, 1ch; rep from* 9times, 1 tr/dc n 2nd ch, turn.

Row 5: 2ch, * work 1dc/sc + 1ch + puff.st + 1ch in space of 1ch; rep from * 9 times, 1 dc/sc in space of 4ch, 2 sl.st in ch of 4th row, 1sl/st in dc/sc of 3rd row, 2 sl.st in ch of 2nd row, 2 sl.st in tr/dc of 1st row, 1 sl.st in 1st tr/dc of 1st round, 1 sl.st in next tr/dc of 1st round.

Make next five petals like the 1st petal.

Part 2.

Round 1: make 3ch, 5 dc/sc in last ch, sl.st in 3rd ch.

Round 2: 2 ch, 1 dc/sc in the same stitch, * 2dc/sc in next st; rep from * 4 times, sl.st in 2nd ch.

Round 3: 2 ch, 1 dc/sc in the same stitch, * 1dc/sc in next st, 2dc/sc in next st; rep from * 4 times, 1dc/sc in next st, sl.st in 2nd ch.

Round 4: 2 ch, 1 dc/sc in the same stitch, * 1dc/sc in each of next 2 dc/sc below, 2dc/sc in next st; rep from * 4 times, 1dc/sc in each of next 2 dc/sc below, sl.st in 2nd ch.

Round 5 and 6: 2ch, 1 dc/sc in each of next dc/sc below, sl.st in 2nd ch.

Round 7: 1ch, * skip 1st, 5tr/dc in next st, skip 1st, 1 dc/sc in next st; rep from *4 times, skip 1st, 5tr/dc in next st, sl.st in ch.

Part 3.

Row 1: *5ch, 1 dc/sc in 5th ch; rep from* 14 times.

Row 2: 3 ch, work 1 incomplete tr/dc in each of 15 ch (this ch where dc/sc was made), yarn over hook and draw up through all loops.

Make the another one "part 3" and join both parts together.

Big Buds

Row 1: make 22 ch, skip 2ch, 1 dc/sc in each of next 1ch, 1 h.tr/h.dc in next ch, 1 tr/dc in next, 1 d.tr/tr in each of next 2ch, 1 tr/dc in next ch, 1 h.tr/h.dc in next ch, 1 dc/sc in each of next 4ch, 1 h.tr/h.dc in next ch, 1 tr/dc in next, 1 d.tr/tr in each of next 2ch, 1 tr/dc in next ch, 1 h.tr/h.dc in next ch, 1 dc/sc in next ch, 3 dc/sc in last ch. 
Continue work on opposite side: 1 dc/sc in each of next 1ch, 1 h.tr/h.dc in next ch, 1 tr/dc in next, 1 d.tr/tr in each of next 2ch, 1 tr/dc in next ch, 1 h.tr/h.dc in next ch, 1 dc/sc in each of next 4ch, 1 h.tr/h.dc in next ch, 1 tr/dc in next, 1 d.tr/d.dc in each of next 2ch, 1 tr/dc in next ch, 1 h.tr/h.dc in next ch, 1 dc/sc in each of next 2ch, sl.st in 1st ch.

Row 2. Join two part of bud using dc/sc join. At first work over left edge, then work 2ch and continue to join on opposite side.

Stem

First part: fasten over 2ch of bud and make 18 ch, skip 2ch, work sl.st in each of next 16ch and 1 sl.st in space of 2ch of bud.

Second part: make 4 ch, 9 tr/dc in last ch, 1 sl.st in 4th ch.

Look at the pictures below and join all parts together.

Small Buds

Round 1: 2ch, 5 dc/sc in last ch, 1 sl.st in first dc/sc.

Round 2: work 1 puff.st in each of next 5dc/sc below, sl.st in 1st puff.st.

Stem

Work like stem for Big Bud, but for 1st part fasten through 2 puff.st. (see pictures below).

Small Flower

Round 1: make 5 ch, * 1dc/sc in last ch, 3 ch; rep from * 3 ties, 1dc/sc in last ch.

Round 2: Work in space of 4 ch and in each of next space of 3 ch: 1dc/sc + 1h.tr/h.dc + 1tr/dc + 2ch + 1tr/dc + 1h.tr/h.dc + 1dc/sc.

Middle part of small flower: make 2 ch, 5 dc/sc in last ch, 1 sl.st in 2nd ch.

Leaves

Spiral leaf:

make 30ch, skip 2ch, sl.st in next. Work in each of next ch 1ch + 1sl.st.

Small leaf:

make 15ch, skip 2ch, 1 dc/sc in next ch, 1 h.tr/h.dc in each of next 2 ch, 1 tr/dc in each of next 6 ch, 1 h.tr/h.dsc in each of next 2 ch, 1 dc/sc in each of next 2 ch.

Big Leaf:

make 18ch, skip 2ch, 1 dc/sc in next ch, 1 h.tr/h.dc in each of next 2 ch, 1 tr/dc in each of next 9 ch, 1 h.tr/h.dc in each of next 2 ch, 1 dc/sc in next ch, 3 dc/sc in last ch. Continue work on opposite side: , 1 dc/sc in next ch, 1 h.tr/h.dc in each of next 2 ch, 1 tr/dc in each of next 9 ch, 1 h.tr/h.dc in each of next 2 ch, 1 dc/sc in next chsl.st in ch.