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・ Clean Air Act 1972
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・ Claytonia nevadensis
・ Claytonia ogilviensis
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Claytonia virginica
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Claytonia virginica : ウィキペディア英語版
Claytonia virginica

''Claytonia virginica'' (L.), the Eastern spring beauty, Virginia spring beauty, or fairy spud, is an herbaceous perennial in the family Montiaceae.〔http://www.tropicos.org/Name/26200023〕 Its native range is Eastern North America.〔USDA Plants, http://plants.usda.gov/java/profile?symbol=CLVI3〕 Its scientific name honors Colonial Virginia botanist John Clayton (1694–1773).
==Description==
Spring beauty is a perennial plant, overwintering through a corm. It is a trailing plant growing to 5–40 cm long. The leaves are slender lanceolate, 3–14 cm long and 0.5–1.3 cm broad, with a 6–20 cm long petiole.
The flowers are 0.7–1.4 cm diameter with five pale pink or white (rarely yellow) petals,〔Claytonia virginica, Flora of North America, http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=220002996〕 and reflect UV light.〔Schemske, D., M. Willson, M. Melampy, L. Miller, L. Verner, K. Schemske, L. Best. 1978. Flowering ecology of some spring woodland herbs. Ecology. 59(2): 351-366〕 It has a raceme inflorescence, in which its flowers branch off of the shoot. The individual flowers bloom for three days, although the five stamens on each flower are only active for a single day.〔Schemske, D., M. Willson, M. Melampy, L. Miller, L. Verner, K. Schemske, L. Best. 1978. Flowering ecology of some spring woodland herbs. Ecology. 59(2): 351-366〕 Flowering occurs between March and May depending on part of its range and weather. The seeds are between 0.2-0.3 cm in diameter and a shiny black.〔Claytonia virginica, Flora of North America, http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=220002996〕 The seeds are released from the capsule fruit when it breaks open.〔Schemske, D., M. Willson, M. Melampy, L. Miller, L. Verner, K. Schemske, L. Best. 1978. Flowering ecology of some spring woodland herbs. Ecology. 59(2): 351-366〕 Elaiosomes are present on the seeds and allow for ant dispersal.〔Claytonia virginica, Flora of North America, http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=220002996〕
It is also a polyploid, having 2n between 12 and 191 chromosomes. The largest number of chromosomes was observed in New York City.〔Cytogeography of Claytonia virginica and its allies, http://www.jstor.org/stable/2395001?seq=1〕

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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