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Dodecatheon dentatum
''Dodecatheon dentatum'' is a species of flowering plant in the family Primulaceae, known by the common names white shooting star and toothed American cowslip. It is native to the Pacific Northwest of North America, including British Columbia, Washington, Oregon and Idaho.
It is an herbaceous perennial growing to in height. The leaves have pointed oval blades up to 10 cm long by 6 cm wide with wavy or toothed edges. Each is borne on a long, winged petiole. The inflorescence contains 1 to 12 flowers. It arises on a tall, erect flowering stalk. The flower corolla has five white lobes each 1 or 2 centimeters long. They are reflexed away from the flower's center, which contains one style surrounded by large reddish, purplish or black anthers containing pollen.〔(''Dodecatheon dentatum''. ) Washington Burke Museum.〕〔(''Dodecatheon dentatum''. ) Flora of North America.〕
This plant has gained the Royal Horticultural Society's Award of Garden Merit.〔(【引用サイトリンク】url=http://apps.rhs.org.uk/plantselector/plant?plantid=666 )〕
This species is sometimes divided into subspecies.〔(''Dodecatheon dentatum''. ) USDA Plants Profile.〕〔(''Dodecatheon dentatum''. ) The Nature Conservancy.〕 Two of these may be treated as separate species, ''Dodecatheon ellisiae'', native to Arizona and New Mexico,〔(''Dodecatheon ellisiae''. ) Flora of North America.〕 and the pink-flowered ''Dodecatheon utahense'', a Utah endemic.〔(''Dodecatheon utahense''. ) Flora of North America.〕
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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