floral clock—
1. a large public clock set out in colorful plants on the ground:
- One of Edinburgh’s most popular attractions, the Floral Clock is located in West Princes Street Gardens.
2. an arrangement of plants that open or close at certain times:
- Few of us would want to plant an entire garden as a floral clock.
Horologe of Flora—(also: Horologium Florae) = floral clock 2:
- Telling time by flowers goes back to the first century and Pliny who devised a “Horologe of Flora.”