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Linnaeus's flower clock was a garden plan hypothesized by Carl Linnaeus that would take advantage of several plants that open or close their flowers at particular times of the day to accurately indicate the time. [1] [2] According to Linnaeus's autobiographical notes, he discovered and developed the floral clock in 1748. [3]
A floral clock, or flower clock, is a large decorative clock with the clock face formed by carpet bedding, usually found in a park or other public recreation area. Most have the mechanism set in the ground under the flowerbed, which is then planted to visually appear as a clock face with moving hands which may also hold bedding plants.
The clock was created in 1955 as a symbol of the city's watchmakers, and a dedication to nature. Its second hand is the longest in the world, at 2.5 metres (8.2 ft). It was the largest flower clock in the world, with a diameter of 5 metres (16 ft), until the 2005 installation of a 15 metres (49 ft) one in Tehran , Iran.
The historic attraction in West Princes Street Gardens will mark the monarch’s Platinum Jubilee.
The uniform alignment of the flowers does result from heliotropism in an earlier development stage, the bud stage, before the appearance of flower heads. The apical bud of the plant will track the Sun during the day from east to west, and then will quickly move west to east overnight as a result of the plant's circadian clock. [11]
A list of permanent working clocks with the largest faces in the world. Entries include all clocks with faces at least 4 m (13 ft) in diameter. Clocks can be located on the exterior or interior of buildings, and towers as well as on the ground as is the case with floral clock faces.
A circadian cycle was first observed in the 18th century in the movement of plant leaves by the French scientist Jean-Jacques d'Ortous de Mairan. [5] [6] In 1751 Swedish botanist and naturalist Carl Linnaeus (Carl von Linné) designed a flower clock using certain species of flowering plants. By arranging the selected species in a circular ...
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