Carl Linnaeus:
Horologium Florae / Flower Clock
Concept | Philosophia Botanica | Stockholm & Amsterdam | 1751
„The time also of solar flowers opening and shutting should be made out in every climate, that any one, without the help of a clock, or seeing the sun, might know the time of the day.“
(Source: Carl Linnaeus, The Elements of Botany, London, 1775, p. 402)