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|genus=Achillea
|genus=Achillea
|species=ptarmica
|species=ptarmica
|common_name=Sneezewort
|common_name=Sneezewort, Sneezeweed, Bastard Pellitory, European Pellitory, Etc.
|name_ref=Flora - A Gardener's Encyclopedia
|name_ref=Wikipedia
|habit=herbaceous
|habit=herbaceous
|habit_ref=Flora - A Gardener's Encyclopedia
|habit_ref=Flora - A Gardener's Encyclopedia
|usda_ref=Flora - A Gardener's Encyclopedia
|usda_ref=Flora - A Gardener's Encyclopedia
|max_zone=10
|max_zone=10
|image=Upload.png
|image=Sneezewort (Achillea ptarmica).jpg
|image_width=240
|image_width=240
}}
}}
'''''Achillea ptarmica''''' ('''Sneezewort''', '''Sneezeweed''', '''Bastard Pellitory''', '''European Pellitory''', '''Fair-maid-of-France''', '''Goose Tongue''', '''Sneezewort Yarrow''', '''Wild Pellitory''', '''White Tansy''') is a species in the genus ''[[Achillea]]''. It has loose clusters of white, button-like [[flower]]s that bloom from June to August. Its dark green [[Leaf|leaves]] have finely-toothed margins.
This is a hardy, drought-tolerant plant that prefers full sun and moist but well-drained [[soil]].
The name ''ptarmica'' comes from the [[Greece|Greek]] word ''ptairo'' (=sneeze) and means 'causes sneezing'.
Like many other plants, the sneezewort's pattern of development displays the [[Fibonacci number|Fibonacci sequence]].<ref name="Britton">{{cite web |url= http://britton.disted.camosun.bc.ca/fibslide/jbfibslide.htm |title= Fibonacci Numbers in Nature |author= Jill Britton |format= [[html]] |date= 7 May 2005 |quote= }}</ref>
The plant is poisonous to cattle, sheep, and horses.
'''''Achillea ptarmica''''' ('''Sneezewort''', '''Sneezeweed''', '''Bastard Pellitory''', '''European Pellitory''', '''Fair-maid-of-France''', '''Goose Tongue''', '''Sneezewort Yarrow''', '''Wild Pellitory''', '''White Tansy''').
{{Inc|
{{Inc|
Achillea ptarmica, Linn. (A. macrocephala, Pill. & Mitterb.). Sneezewort. Height 1-2 ft.: lvs. serrate: fls. in loose corymbs; all summer. North temperate regions.— Its full-double var. The Pearl (Fig. 104) is much used for cut-flowers and in cemeteries, and is one of the most popular of all hardy herbaceous plants. There are many other varieties.{{SCH}}
Achillea ptarmica, Linn. (A. macrocephala, Pill. & Mitterb.). Sneezewort. Height 1-2 ft.: lvs. serrate: fls. in loose corymbs; all summer. North temperate regions.— Its full-double var. The Pearl is much used for cut-flowers and in cemeteries, and is one of the most popular of all hardy herbaceous plants. There are many other varieties.{{SCH}}
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