Answer: You are thinking of what is commonly called a flower clock. I believe the inspiration for these must have come from work done
by early botanists including Linneaus in Sweden. Sharon Lovejoy's
book "Sunflower Houses: Garden Discoveries for Children of All
Ages" (ISBN 0-934026-70-X) includes detailed instructions on
creating a floral clock beginning on page 32. A brief look at Linneaus'
work on flower blooming times can be found here:
and a very detailed discussion
Unfortunately I can't find a sample plan from the Victorian era, but this
should get you started. Good luck with your project!
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