Английская Википедия:Anemone occidentalis

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Anemone occidentalis, the white pasqueflower or western pasqueflower, is a herbaceous species of flowering plant in the buttercup family Ranunculaceae. Other authorities place it in the genus Pulsatilla.Шаблон:Citation needed Individuals are Шаблон:Convert tall, from caudices, with three to six leaves at the base of the plant that are 3-foliolate, each leaflet pinnatifid to dissected in shape. Leaf petioles are Шаблон:Convert long. Leaves have villous hairs and their margins are pinnatifid or dissected. Plants flower briefly mid-spring to mid-summer, usually soon after the ground is exposed by melting snow. The flowers are composed of five to seven sepals (sometimes called tepals), normally white or soft purple, also mixed white and blueish purple, one flower per stem. The sepals are Шаблон:Convert long and Шаблон:Convert wide. Flowers have 150–200 stamens. The fruit occurs in heads rounded to subcylindric in shape, with pedicels Шаблон:Convert long. The achenes are ellipsoid in shape, not winged, covered with villous hairs, with beaks curved that reflex as they age and Шаблон:Convert long, feather-like. Generally, the fruit persists into fall.

Native to far western North America including British Columbia to California and Montana, it is found growing in gravelly soils on slopes and in moist meadows.

Chemistry

Western pasqueflower likely contains ranunculin and protoanemonin, an irritant glycoside and its aglycone, as these are seen in most members of this genus and the plant's latex is irritating. It can be fatal to domestic animals, particularly to sheep, and should thus not be eaten by humans.

Traditional medicine

The fresh stems and seeds of the plant are used traditionally in North America as analgesics, anxiolytics, and sedatives.

Landmarks

Pulsatilla Pass in Banff National Park is named after this species.

Image gallery

• Anemone occidentalis in Kootenay National Park, Canada

  Anemone occidentalis in Kootenay National Park, Canada

• Anemone occidentalis flower

  Anemone occidentalis flower

• Anemone occidentalis flowers

  Anemone occidentalis flowers

• Anemone occidentalis on Mount Rainier with some achenes cut away to show the receptacle and seeds.

  Anemone occidentalis on Mount Rainier with some achenes cut away to show the receptacle and seeds.

• The persistent achene and foliage are distinguishing features.

  The persistent achene and foliage are distinguishing features.

References

Шаблон:Ranunculales-stub