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Eupatorium coelestinum
Sometimes in the genus, Conoclidium |
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Mistflower, Hardy or Perennial Ageratum,
Blue Boneset |
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 5-10 |
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Eastern
and Central United States |
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Rhizomatous, erect perennial of damp thickets and stream
banks. |
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24 inches tall with a spread of 18-24 inches |
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Heads in compact clusters, 35-70 flowers, each
flower about ˝ inch across, in dense corymbs.
Flowers are bluish purple and look very much
like the flowers of Mexican Ageratum. |
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Midsummer to frost |
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Opposite, triangular-ovate, 1˝-3 inches long,
obtuse or acute, truncate or abruptly
contracted at the base, coarsely toothed. |
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Eupatorium is named for Mithridates Eupator, ancient king of Pontus,
who was said to have employed one of the eupatoriums for
medicinal use. |
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