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common herb (Centaurea cyanus) 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). It is a garden flower in the United States but a weed in the grainfields of Europe. It is called bluebottle or bluet in England and bluebonnet in Scotland; in North America the cornflower shares with other plants the names ragged robin, bachelor's button, or ragged sailor. The long-stemmed blue heads of the flowers, having radiating bottle- or vase-shaped florets, yield a juice which, mixed with alum, has been used as a dye. Cornflowers 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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Intense blue strikingly shaped flower with grey-green stem, grows up to 3 ft tall (1m) with thin sword-shaped leaves. Juiced stems and flowers used externally to treat wounds and cuts, mouth sores, infectious disease, weak eyes, dark circles and wrinkles under eyes, inflammation of eyelids, bruises, insect bites, stings. Internally used for diarrhea, kidney and urinary issues, rheumatism.



(Centaurea), a genus of herbaceous plants of the family Compositae. The inflorescences (calathides) have bristly receptacles and tubular, varicolored flowers (purple, pink, blue, yellow); the marginal ones are sexless, and if enlarged, are shaped like tubular funnels. There are over 550 species in Eurasia, tropical Africa, and North and South America (Chile), and there is one species in Australia. The greatest number of representatives are in the Mediterranean and Near Eastern countries. In the USSR there are approximately 180 species; widely distributed (except in the Far North) are the blue cornflower (C. cyanus) and the meadow cornflower (C. jacea). The blue cornflower is a weed but is also a nectariferous and medicinal plant. Some cornflowers are grown as decorative plants.


Flora SSSR, [vol.] 28. Moscow-Leningrad, 1963.



a Eurasian herbaceous plant, Centaurea cyanus, with blue, purple, pink, or white flowers, formerly a common weed in cornfields: family Asteraceae (composites)
References in periodicals archive ?
And even though I never plan for flowers on paper, every year, in order to assuage my inner flower child, I grab a package of bachelor buttons or nasturtiums on the way out of the local hardware store.
As for annual flowers, several are still plantable in July, including: bachelor button, cosmos, marigold, nasturtium and zinnia.
Marigolds, calendula, cosmos and bachelor button flower seeds are easy to save, too, and those flowers are good ones for gardens because they attract good insects -- lady bugs, lace wings which eat aphids, and believe it or not, wasps.