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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 pappusIn Asteraceae, the pappus is the modified calyx, [1] the part of an individual floret, that surrounds the base of the corolla tube in flower.
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]
Five dandelion flowers are the emblem of White Sulphur Springs, West Virginia. [81] The citizens celebrate spring with an annual Dandelion Festival. [82] The dandelion is the official flower of the University of Rochester in New York State, and "Dandelion Yellow" is one of the school's official colors. "The Dandelion Yellow" is an official ...
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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.
The rack and snail striking mechanism used in repeaters is described in detail in the striking clock article. Repeater clocks often had a cord with a button on the end protruding from the side of the clock. Pulling the cord actuated the repeater mechanism. This was called a pull repeater. Repeating carriage clocks have a button on the top to ...
The Nychthemeron Clock in Snowshill Manor, Gloucestershire, UK Nychthemeron / n ɪ k ˈ θ ɛ m ər ɒ n / , occasionally nycthemeron or nuchthemeron , is a period of 24 consecutive hours . It is sometimes used, especially in technical literature, to avoid the ambiguity inherent in the term day .