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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 sunflower was chosen as the symbol of the Spiritualist Church, for many reasons, but mostly because of the (false) belief that the flowers turn toward the sun as "Spiritualism turns toward the light of truth". Modern Spiritualists often have art or jewelry with sunflower designs. [83] The sunflower is often used as a symbol of green ideology.
Thus, if a sunflower, in turning towards the sun, becomes by that very act fully capable, without further condition, of reproducing a sunflower which turns in precisely corresponding ways toward the sun, and of doing so with the same reproductive power, the sunflower would become a Representamen of the sun.
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Heliotropism: the diurnal motion or seasonal motion of plant parts in response to the direction of the Sun, (e.g. the sunflower) Apheliotropism: negative heliotropism Hydrotropism : movement or growth in response to water ; in plants, the root cap senses differences in water moisture in the soil, and signals cellular changes that cause the root ...
Sunflowers with the Sun behind them. Sunflowers do not always point to the Sun. Flowering sunflowers face a fixed direction (often east) all day long, but do not necessarily face the Sun. [123] However, in an earlier developmental stage, before the appearance of flower heads, the immature buds do track the Sun (a phenomenon called heliotropism ...
The large vase of flowers, at the far left corner, is Jan Brueghel's contribution to the painting. The flower arrangement is crowned by a large sunflower (Helianthus annuus), an American flower which can grow to 14 feet tall and turns toward the sun. A recent arrival in Europe, the flower had been illustrated in botanical books, but this is its ...
Clytie turns into a sunflower as the Sun refuses to look at her, engraving by Abraham van Diepenbeeck. Clytie intended to win Helios back by taking away his new love, but her plan backfired on her, and her actions only hardened his heart against her. [14] Thereafter Helios avoided her altogether, never going back to her. [15]