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Taraxacum officinale, the dandelion or common dandelion, [6] is a herbaceous perennial flowering plant in the daisy family, Asteraceae. The common dandelion is well known for its yellow flower heads that turn into round balls of many silver-tufted fruits that disperse in the wind. These balls are called "clocks" in both British and American ...
The pappus-clad fruits that make up the familiar "dandelion clock" being dispersed by the wind (family Asteraceae) Bidens frondosa achenes with barbed pappus. In Asteraceae, the pappus is the modified calyx, [1] the part of an individual floret, that surrounds the base of the corolla tube in flower.
Dandelion bilobed stigma bearing pollen. Taraxacum (/ t ə ˈ r æ k s ə k ə m /) [3] is a large genus of flowering plants in the family Asteraceae, which consists of species commonly known as dandelions.
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]
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Rosa hypanthium encircling separate achene fruits. An achene (/ ə ˈ k iː n /; [1] from Ancient Greek ἀ (a) 'privative' and χαίνειν (khaínein) 'to gape'), [2] also sometimes called akene and occasionally achenium or achenocarp, is a type of simple dry fruit produced by many species of flowering plants.
A torsion pendulum clock, more commonly known as an anniversary clock or 400-day clock, is a mechanical clock which keeps time with a mechanism called a torsion pendulum. This is a weighted disk or wheel, often a decorative wheel with three or four chrome balls on ornate spokes, suspended by a thin wire or ribbon called a torsion spring (also ...
The hourglass is often used as a symbol representing the passage of time Clocks; a watch-maker seated at his workbench. Chronometry [a] or horology [b] (lit. ' the study of time ') is the science studying the measurement of time and timekeeping. [3]