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''Artemisia ludoviciana'' is North American species in the daisy family, known by several common names, including silver wormwood, western mugwort, Louisiana wormwood, white sagebrush, and gray sagewort.〔 ''Artemisia ludoviciana'' is native to North America where it is widespread across most of the United States, Canada, Mexico, and Central America,〔(Flora of North America Vol. 19, 20 and 21 Page 527 Silver wormwood, white or silver sage ''Artemisia ludoviciana'' Nuttall, Gen. N. Amer. Pl. 2: 143. 1818. )〕〔Berendsohn, W.G. & A.E. Araniva de González. 1989. Listado básico de la Flora Salvadorensis: Dicotyledonae, Sympetalae (pro parte): Labiatae, Bignoniaceae, Acanthaceae, Pedaliaceae, Martyniaceae, Gesneriaceae, Compositae. Cuscatlania 1(3): 290–1–290–13〕〔Turner, B. L. 1996. The Comps of Mexico: A systematic account of the family Asteraceae, vol. 6. Tageteae and Athemideae. Phytologia Memoirs 10: i–ii, 1–22, 43–93〕 although indications suggest that the populations in the eastern United States have been introduced from the western and central part of the country.〔(Biota of North America Program 21014 county distribution map )〕 This is a rhizomatous perennial plant growing to heights between 30 centimeters and one meter. The stems bear linear leaves up to 11 centimeters long. The stems and foliage are covered in woolly gray or white hairs. The top of the stem is occupied by a narrow inflorescence of many nodding (hanging)flower heads. Each small head is a cup of hairy phyllaries surrounding a center of yellowish disc florets and is about half a centimeter wide. The fruit is a minute achene. This plant was used by many Native American groups for a variety of medicinal, veterinary, and ceremonial purposes. ;Subspecies〔〔〔(Keck, David Daniels 1946. A revision of the ''Artemisia vulgaris'' complex in North America. Proceedings of the California Academy of Sciences, Series 4, 25(17): 421-468 ) descriptions, line drawings, range maps of several species〕 *''Artemisia ludoviciana'' subsp. ''albula'' (Wooton) D.D.Keck - deserts from California + Colorado to Chihuahua, Sonora, Baja California *''Artemisia ludoviciana'' subsp. ''candicans'' (Rydb.) D.D.Keck - Rockies + Cascades from Alberta + British Columbia to California + Colorado *''Artemisia ludoviciana'' subsp. ''incompta'' (Nutt.) D.D.Keck - mountains from Alberta + British Columbia to Mexico *''Artemisia ludoviciana'' subsp. ''ludoviciana'' - western + central United States + western Canada *''Artemisia ludoviciana'' subsp. ''mexicana'' (Willd. ex Spreng.) D.D.Keck - Mexico as far south as Puebla; United States as far north as Colorado + Missouri *''Artemisia ludoviciana'' subsp. ''redolens'' (A.Gray) D.D.Keck - Durango, Chihuahua, Arizona, New Mexico, Texas *''Artemisia ludoviciana'' subsp. ''sulcata'' (Rydb.) D.D.Keck - Chihuahua, Sonora, Arizona == Etymology == Ludoviciana is the Latinized version of the word Louisiana. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Artemisia ludoviciana」の詳細全文を読む スポンサード リンク
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