dahlia


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dahlia

(däl`yə, dăl`–) [for Anders Dahl, 1751–89, Swedish botanist and pupil of LinnaeusLinnaeus, Carolus
, 1707–78, Swedish botanist and taxonomist, considered the founder of the binomial system of nomenclature and the originator of modern scientific classification of plants and animals. He studied botany and medicine and taught both at Uppsala.
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], any plant of the genus Dahlia of the family Asteraceae (asteraster
[Gr.,=star], common name for the Asteraceae (Compositae), the aster family, in North America, name for plants of the genus Aster, sometimes called wild asters, and for a related plant more correctly called China aster (Callistephus chinensis
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 family), tuberous-rooted perennials native to Mexico and Guatemala and widely cultivated in gardens. Most of the several thousand horticultural varieties have been developed from the single species (D. pinnata) of garden dahlia introduced into cultivation in England c.1800, but other species and hybrids, e.g., the cactus dahlia (D. juarezii) are also grown. Dahlias are stout and rather woody plants, some species reaching the stature of small trees, with late-blooming flowers in a wide range of colors and sizes. The tubers of the garden dahlia were one source of fructose, used by diabetics. Dahlias are classified in the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
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, class Magnoliopsida, order Asterales, family Asteraceae.
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dahlia

dahlia

There are so many versions of this amazingly beautiful flower family it’s mind-blowing. Some can grow taller than a person. Related to sunflowers , chrysanthemums, daisies, marigolds, dandelion, Jerusalem Artichokes. Flowers and roots edible. Root (tuber) flavors range from spicy apple to water chestnut or celery root. Some use them in place of potatoes. There are so many varieties, it’s not known if all are edible, but the assumption is that most are. You are on your own here. Dahlia pinnata is definitely edible. Roots contain a natural fructose polymer called Inulin, which helps reduce appetite by slowing the body's metabolism of carbohydrates. A sweet juice is extracted from the dahlia root and cooked at low temperatures to produce a syrup that is 93 percent inulin, a complex carbohydrate that is caloriefree, and a great probiotic food source. Since inulin doesn't stress the pancreas, it’s great for diabetics.

Dahlia

 

a genus of perennial herbaceous plants of the thistle family (Compositae), with thickened, tuberoid roots. The stalk is hollow, 35-200 cm high. The leaves are opposite, pinnate, or triple pinnate. The inflorescence is a calathide and consists of a large number of tubular and Ungulate blossoms, or only ungulate blossoms, extremely varied in color. Approximately 15 wild species are known, distributed in Mexico and Guatemala.

The dahlia appeared in cultivation in Europe at the end of the 18th century. There are more than 8,000 varieties, obtained by hybridization. Garden dahlias are divided into three groups, according to type of inflorescence: single (simple and miniature), with one row of outer Ungulate blossoms (the rest of the blossoms are tubular); semidouble (anemone-like and collar-shaped), with two to three rows of Ungulate blossoms; and double (pompoms, globular dahlias, ornamentals, cactus dahlias, and several others), in which the tubular blossoms are all or almost all transformed into Ungulate ones (barren ones). The dimensions of the inflorescences are 3-35 cm. In ornamental horticulture dahlias are used for individual and group plantings and as cut flowers.

Dahlias are propagated by cuttings, division of tubers, and seeds. Well-lighted areas with fertilized soils are used for dahlia plantings. In order to obtain large flowers, no more than three stems are left on the bush; superfluous shoots are removed as soon as they appear, as are side shoots (shoots in the leaf axils). Care consists of abundant irrigation, frequent cultivation of the soil, feeding, and weeding. Tubers are dug up after autumn frosts for winter storage. The dried tubers are stored in a dry, dark place at a temperature of 4°-5° C in a single layer.

REFERENCES

Sharonova, M. Georginy. Moscow, 1952.
Zalivskii, I. L. Georginy, 3rd ed. Moscow-Leningrad, 1959.

dahlia

symbol of dignity. [Flower Symbolism: Jobes, 406]
See: Dignity

dahlia

represents elegance. [Flower Symbolism: Jobes, 406]

dahlia

of Mexico. [Flower Symbolism: WB, 7: 264]

dahlia

symbol of splendor. [Plant Symbolism: Flora Symbolica, 168]

dahlia

1. any herbaceous perennial plant of the Mexican genus Dahlia, having showy flowers and tuberous roots, esp any horticultural variety derived from D. pinnata: family Asteraceae (composites)
2. the flower or root of any of these plants
References in periodicals archive ?
One of the dahlias won a prize at the Harrogate Autumn Flower Show.
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While a few of these are really the domain of the dedicated dahlia fanatics who purely "grow to show", there are still a staggering number on general sale in garden centres.
A splendid orange flowered dahlia with almost black foliage is David Howard.
So it is perhaps appropriate that I got a letter from Bryan Stanley Ward of Bucks adamantly telling me that he doesn't lift his dahlias in winter.