The Cabbage Rose pattern in Best of Maggie Weldon Crochet Afghans has a very similar rose. NOTE: I HAVE NOW ADDED PATTERN DIRECTIONS BELOW THE PHOTO!
Here's a closeup that shows the scallops and flower shapes better.
Here are the pattern directions as they originally appeared in a 1971 issue of Women's Day. Keep in mind that the flower square starts out rectangular and extra stitches are put on 2 sides to square it up. Also, I used a K hook. A J hook would not give me gauge. I also hated the fringe and instead did a scalloped border starting with 1 row of the flower color and then switching to the green.
Six Petal Rose Afghan
41 x 56 inches
Materials: 5 skeins black worsted
2 skeins green
2 skeins magenta
Crochet hook J or size to give correct gauge
With black, ch 5, join with sl st to form a ring.
Rnd 1: ch 3, 2 dc in ring, (ch3, 3dc in ring) 3 times, ch 3, join with slip stitch in top of ch 3.
Rnd 2: Sl st to next ch 3 sp, ch3, 2 dc, ch3, dc in space, *3 dc, ch3, 3dc in next ch 3 sp (corner group made). Repeat from *. Join with sl st in top of ch 3. Fasten off.
Rnd 3: Attach green to corner ch 3, 2 dc, ch3, 3 dc in corner sp, *3dc in next space, work corner group in corner space. Repeat from * once. 3 dc in next space. Join in top of ch 3. Fasten off.
Rnd 4: Attach black, * work corner group in corner space, 3 dc in each sp. Repeat from * around. Join.
Rounds 5&6: Repeat rnd 4. Fasten off. Make 16 more plain motifs.
With magenta, ch 6, join to form a ring.
Rnd 1: Ch 5, sc in circle 6 times. Join with sl st in first sc.
Rnd 2: In ch 5 loop; * 1 sc (ch1, 1dc) twice, ch 1, 1 sc. Repeat from * around.
Rnd 3: *1 sc around bar of next sc of 1st rnd, ch6. Repeat from * around. Join
Rnd 4: In ch 6 loop, *1 sc (Ch1, 1dc) three times, ch 1, 1 sc. Repeat from * around. Join Fasten off magenta.
Rnd 5: Attach green between scs of petals, sc in same place. *Ch 6, 1 sc in space between next 2 petals. Repeat from * around. Join.
Rnd 6: Ch 3, 2dc in same sc. *In next lp, 3 dc, ch 3, 3 dc: in next lp, 3 dc: in next lp 3 dc, ch 3, 3 dc*. Now 3 dc in next sc. Repeat between * once. Join. Fasten off green.
Rnd 7: Attack black and work to correspond to last 3 rnds of plain motif. Make 17 more flower motifs.
Finish: Sew motifs together alternating motifs. Fringe ends as follows. To make fringe: Cut yarn in 12 inch lengths using 4 strands of 1 color, knot fringe between dc groups. Alternate colors as follows: 1 black, 1 magenta, 1 green, 2 magenta