''Anemonoides oregana'' (commonly called ''Anemone oregana'') is a species of flowering plant in the

buttercup ''Ranunculus'' is a large genus of about almost 1700 to more than 1800 species of flowering plants in the family Ranunculaceae. Members of the genus are known as buttercups, spearworts and water crowfoots. The genus is distributed in Europe, ...

family known by the common names blue windflower, Oregon anemone, and western wood anemone. It is native to the forests of Washington, Oregon, and northern California in western North America, generally below elevation.

Taxonomy

The Oregon anemone was first formally named by Asa Gray in 1887. It has sometimes been treated as a subspecies or variety of '' A. nemorosa'' or '' A. quinquefolia''. Two varieties are sometimes accepted: * ''A. oregana'' var. ''oregana'' is found from Chelan County, Washington south to California and less commonly west of the Cascade Range. * ''A. oregana'' var. ''felix'' is a generally smaller variety limited to coastal wetlands of

Grays Harbor County, Washington Grays Harbor County is a county in the U.S. state of Washington. As of the 2020 census, the population was 75,636. Its county seat is Montesano, and its largest city is Aberdeen. Grays Harbor County is included in the Aberdeen Micropolita ...

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Lincoln County, Oregon Lincoln County is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, its population was 50,395. The county seat is Newport. The county is named for Abraham Lincoln, 16th president of the United States. Lincoln County ...

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Kew Kew () is a district in the London Borough of Richmond upon Thames. Its population at the 2011 census was 11,436. Kew is the location of the Royal Botanic Gardens ("Kew Gardens"), now a World Heritage Site, which includes Kew Palace. Kew is a ...

's Plants of the World Online accepts no infraspecific taxa of ''Anemonoides oregana''.

Description

''Anemone oregana'' is a perennial herb growing from a thick rhizome, generally high, but exceptionally to . A single basal leaf made up of three large leaflets on a petiole may be present. The

inflorescence An inflorescence is a group or cluster of flowers arranged on a Plant stem, stem that is composed of a main branch or a complicated arrangement of branches. Morphology (biology), Morphologically, it is the modified part of the shoot of sperma ...

consists of a single tier of three leaflike bracts and a single flower. The bracts are similar to the basal leaf when the latter is present. The terminal leaflet may have a petiole or may be sessile. Its margin is sharply toothed on the distal half or third and its tip is pointed. Lateral leaflets may have a single lobe. The flower has no petals but 5 to 7 petal-like

sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coine ...

s in any of several colors, usually blue or purple but sometimes reddish, pink, white, or bicolored. In the center of the flower are up to 75 thin stamens. The fruit is a cluster of achenes.

References

{{Taxonbar, from1=Q98179284, from2=Q4115560 oregana Flora of California Flora of Oregon Flora of Washington (state) Plants described in 1887 Flora without expected TNC conservation status