This autumnal beauty of a scarf is being modeled by my own feline punkin, Alex The Cat. It's not so totally original, since I found the stitch pattern here: http://www.nurhanne.com/crochet/stitches2.html
So here's what you do:
Bulky Yarn (how many yards? I'm afraid I have no idea, not being the type who measures out how much yarn I'm using. I recycled a sweater for the yarn, it's a pumpkin-colored bulky acrylic/ramie blend.The scarf took up half a small knit sweater. If you were using, say, Lion Brand Homespun, I'd say a skein and a half.)
A J hook.
Make a chain as long as you want your scarf to be, because this scarf is worked horizontally. My chain was about five feet long.
Base row: 1 dc in 2. ch from hook, * miss 3 ch, (3 tr, 1 ch, 3 tr) in next st, miss next 3 sts, 1 dc in next st. repeat from * to end of row, Turn with 3 ch.
1. row: Yoh, insert hook in first tr and draw up thread, yoh and draw though 2 loops, repeat for each of next 2 stitches (= 4 loops on hook), yoh and draw though all 4 loops. * 3 ch, 1 dc by inserting hoook under 1 ch between clusters of prev row, 3 ch, 1 'unfinished tr (as previously) in each of the 3 tr in row below, miss the dc, 1 'unfinished' tr in each of the next 3 tr (= 7 loops on hook), yoh and draw through all 7 loops. Repeat from * to end of row, ending with 1 'unfinished' tr in each of last 2 sts, yoh and draw through all 4 loops, 1 tr in last dc. (In subsequent rows this tr is worked in the top turning ch). Turn with 3 ch.
2. row: 3 tr in the st that 'closes' the 3 tr in row below, * insert hook in ch under the dc from previous row and work 1 dc, ( 3 tr, 1 ch, 3 tr) in st that 'closes' the 6 tr. repeat from * to end of row, ending with 3 tr in the st that 'closes' the 3 tr, 1 tr in in turning ch. Turn with 3 ch.
3. row: * 1 unfinished tr in each of first 3 tr, miss 1 dc, 1 unfinished tr in each of next 3 tr, yoh and draw through all 7 loops, 3 ch, 1 dc by inserting hoook under 1 ch between clusters of prev row, 3 ch. repeat from * to end of row, but finish by working 1 tr in the turning ch. turn with 2 ch.
4. row: * ( 3 tr, 1 ch, 3 tr) in st that 'closes' the 6 tr, 1 dc in dc before next cluster. Repeat from *, but finish with 1 tr in turning ch.
Now, one long side of the scarf is scalloped and one is flat, right? So you want to cut your yarn, reattach it on the beginning corner of the flat side, and work row 4 on the flat side. End off. Do a row of sc on each short end of the scarf, add tassels, and you're done!