A number of species of Taraxacum are regarded by some gardeners as seed dispersed weeds or ruderals, especially the Common dandelion (T. officinale), which has been introduced over much of the temperate world. After pollination and flowering is finished, the dandelion flower dries out for a day or two and then the seed-bearing parachutes expand and lift out of the dried flower head. The dried part of the flower drops off and the parachute ball opens into a full sphere. The parachute drops off when the seed strikes an obstacle. Often dandelions are observed growing in crevices near a wall; when the blowing fruits hit the wall, the feathery pappi comes off, dropping the dandelion seeds to the base of the wall or into a crevice. After the seed is released, the parachutes lose their feathered structure and take on a fuzzy, cotton-like appearance, often called "dandelion snow".
Away from their native regions, some dandelion species have become established in the Americas, Australia, and New Zealand, and are now common throughout all temperate regions, Taraxacum officinale has become a nearly world wide flower.
Source: http://en.wikipedia.org/wiki/Dandelion
See Also: Flowers, Send Flowers, Flower Delivery
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