I feel a little awkward doing this, in case someone created and sells this design, but below is what I gather from the photo. If the owner of this design comes round, let me know and I will replace this post with credit and a link to the designer.
It definitely looks like three strands of copper wire.
String a couple of cute little green beads onto each strand.
Do a couple of series of the braiding, loosely, sliding a bead up to each bump. (braiding = three strands held roughly parallel, take strand on right, and move it up and over to the center position, then take the strand on the left, and move it to the new middle position and continue) Every time you move a strand, slide a bead up as far as it goes.
After two braid cycles, and 6 small beads, do one braid cycle without any beads, sort of tight.
Then take your larger, flower colored beads and string two of the dark color on the right strand, two of the darker color on the left strand, and a dark, then light, then dark bead on the middle strand. No braiding with these. Snug them together to make then into a flower shape.
Do another tight, beadless braid cycle.
Create 3 flowers and 4 sets of leaves. (or however many you need for teh desired length, taking into account the clasp you select)
To add the larger leaves, string a larger green bead onto a copper colored head pin (it looks like a regular straight pin, but the tip is just cut flat, not pointed... like a tiny blunt nail) Slide the bead all the way to the head, and then cut the pin with wire cutters so that about a half to 3/8 inch sticks out. Use rounded needle nose pliers to curl that half inch into a closed loop. OH, if you're clever, you'll make these up in advance so you can just string them on at each tight braid cycle LOL
The design in the picture alternates between dark petals with a light center, and light petals with a dark center.
Then loop the three strands, crimp them together, and attach whatever sort of clasp you like.
As an alternative to crimping (it may be tough to find a crimp bead in that color that is also large enough for three strands doubled over) you could curl each strand into a loop and run your clasp through all three. This is not as secure as a crimp, but crimps are tough to find in any variety.
You could also crimp each strand separately and do as above. Or experiment with using beads and curls as stoppers. Post what you come up with
Ooh, I kinda think they may have used a wire wrap at the ends. You make a loop and then wrap wire tightly around the loop's "neck" but make sure you don't leave any sharp points hanging out.