Yet the world could use a dance tune called The Shepherd's Purse.

Here's a picture of the plant:

http://www.illinoiswildflowers.info/weeds/plants/shepherd_purse.htm

We see jagged leaves in a circle with a tall, spindly flower stalk. Clearly we need a jig or reel which mostly zigzags back on itself but has one place where the melody zips way high to evoke the flower stalk.

I'd write it, but my sound card is fried.
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Rodge, it appears you can find sheet music and abc online is you omit the word Waltz. Search for "The Shepherd's Wife."