
1) Blue garden flower 2) Border plant 3) Conoclinium coelestinum 4) Eupatorium coelestinum 5) Flower 6) Garden flower 7) Mistflower
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https://www.crosswordclues.com/clue/ageratum

1) Mistflower
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https://www.crosswordclues.com/clue/ageratum

Ageratum (əm), (whiteweed in the USA), is a genus of 40 to 60 tropical and warm temperate flowering annuals and perennials from the family Asteraceae, tribe Eupatorieae. Most species are native to Central America and Mexico but four are native to the United States. They form tussocks or small hills. They grow to a height of 30 in. The opposite le...
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http://en.wikipedia.org/wiki/Ageratum

• (n.) A genus of plants, one species of which (A. Mexicanum) has lavender-blue flowers in dense clusters.
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http://thinkexist.com/dictionary/meaning/ageratum/

any of about 45 species of annual herbs making up the genus Ageratum (family Asteraceae), and native to tropical South America. They have toothed, ...
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http://www.britannica.com/eb/a-z/a/28

(Flossflower) These medium and low growing annuals are natives of Mexico. They have ovate leaves, 2 inches long and small clusters of fluffy, lavender-blue, white or pink flowers that are from 2 to 4 inches across. They are used for edging or carpeting flowerbeds, for window and porch boxes and in borders.…
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http://www.encyclo.co.uk/local/10004
A·ger'a·tum noun [ New Latin , from Greek ... a sort of plant;
'a priv. + ... old age.]
(Botany) A genus of plants, one species of which (
A. Mexicanum ) has lavender- blue flowers in dense clusters.
Found on
http://www.encyclo.co.uk/webster/A/43

Ageratum is a genua of composite plants of the warmer parts of America, one species of which, Ageratum mexicdnum, is a well-known flower-border annual with dense lavender-blue heads. From it have been derived several varieties with flowers of different colours used chiefly as bedding plants.
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http://www.probertencyclopaedia.com/browse/BA.HTM

[
n] - any plant of the genus Ageratum having opposite leaves and small heads of blue or white flowers
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http://www.webdictionary.co.uk/definition.php?query=ageratum

any of several composite plants of the genus Ageratum, esp. A. houstonianum, having heart-shaped leaves and small, dense, blue, lavender, or white flower heads, often grown in gardens. · any of various other composite plants, as the mistflower, having blue or white flowers.
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https://www.infoplease.com/dictionary/ageratum
No exact match found.