Something interesting from History Ref. A book "FLOWER HUNTERS" by Mary Gribbin and John Gribbin
Carl Linnaeus had observed the time that flowers capable of growing in Sweden opened and closed each day and he devised a plan which arranged plants opening and closing at different times of day so enabling him to plant a 'floral clock' that could (hopefully) determine the time accurately within half an hour. There is no record of Linnaeus actually managing to cultivate such a clock, and the idea, which he published in *Philosophica botanica* in 1751, may well have been theoretical rather than practical garden project. He backed from the idea for his son Carl Linnaeus,who began to write a paper on the same project. This thesis (*Horologium Plantarium*)was never completed and Carl seem to have become disenchanted by the idea. Some references on Net http://www.bbc.co.uk/dna/h2g2/A5170024 http://ces.iisc.ernet.in/hpg/envis/doc28.html
