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A timelapse of the leaves of O. triangularis closing at night. The recording is at ~750x actual speed and covers a 1.5 hr period of time. The leaves of O. triangularis move in response to light levels, opening in high ambient light (in the day) and closing at low light levels (at night). During this movement, the leaflets fold at the level of ...
English: Oxalis triangularis (Purple Shamrock) is a classic example of a plant which responds with movement to external stimulus. The leaves open and close in response to varying light levels with the result that they are open during during the day and close at night.
Heliotropism, a form of tropism, is the diurnal or seasonal motion of plant parts (flowers or leaves) in response to the direction of the Sun. The habit of some plants to move in the direction of the Sun, a form of tropism, was already known by the Ancient Greeks. They named one of those plants after that property Heliotropium, meaning "sun turn".
The shamrock carries religious ties, while the four-leaf clover is considered a sign of luck due to its exceeding rarity. In fact, around one out of 10,000 clovers have four leaves.
The earliest recorded observation of this behavior in plants dates back to 324 BC when Androsthenes of Thasos, a companion to Alexander the Great, noted the opening and closing of tamarind tree leaves from day to night. [15] Carl Linnaeus (1729) proposed that this was the plants sleeping, but this idea has been widely contested.
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Butterfly Bush (Buddleja davidii) Also called summer lilac, this fast-growing shrub can grow up 6 to 12 feet tall and be equally as wide. If you want a more compact plant, there are dwarf versions ...
Oxalis (/ ˈ ɒ k s ə l ɪ s / (American English) [1] or / ɒ k s ˈ ɑː l ɪ s / (British English)) [2] is a large genus of flowering plants in the wood-sorrel family, Oxalidaceae, comprising over 550 species. [3]