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''Sagittaria cuneata'' is a species of flowering plant in the water plantain family known by the common name arumleaf arrowhead or duck potato. Like some other ''Sagittaria'' species, it may be called wapato. It is native to much of North America, including most of Canada (every province and territory except Nunavut) as well as the western and northeastern United States (New England, Great Lakes, Great Plains, Rocky Mountain, Great Basin and Pacific Coast states; including Alaska but not Hawaii).〔(Flora of North America )〕〔(Biota of North America Program, map, ''Sagittaria cuneata'' )〕〔(Kew World Checklist of Selected Plant Families )〕 ''Sagittaria cuneata'' is an aquatic plant, growing in slow-moving and stagnant water bodies such as ponds and small streams. It is quite variable in appearance, and submerged parts of the plant look different from those growing above the surface or on land. In general it is a perennial herb growing from a white or blue-tinged tuber. The leaves are variable in shape, many of them sagittate (arrow-shaped) with two smaller, pointed lobes opposite the tip. The leaf blades are borne on very long petioles. The plant is monoecious, with individuals bearing both male and female flowers. The inflorescence which rises above the surface of the water is a raceme made up of several whorls of flowers, the lowest node bearing female flowers and upper nodes bearing male flowers. The flower is up to 2.5 centimeters wide with white petals. The male flowers have rings of yellow stamens at the centers. Each female flower has a spherical cluster of pistils which develops into a group of tiny fruits.〔(Jepson Manual Treatment )〕〔(USDA Plants Profile )〕〔(Sheldon, Edmund Perry. 1893. Bulletin of the Torrey Botanical Club 20(7): 283, pl. 159, ''Sagittaria cuneata'' )〕〔Gandoger, Michel. 1920. Bulletin de la Société Botanique de France 66: 294, ''Sagittaria suksdorfii''〕〔Blankinship, Joseph William. 1905. Science Studies, Montana College of Agriculture and Mechanic Arts. Botany, Bozeman 1: 40, pl. 6, ''Sagittaria paniculata''〕 ==External links== *(US Department of Agriculture Plants profile, ''Sagittaria cuneata' ) *(photo of herbarium specimen at Missouri Botanical Garden, collected in Idaho, isoepitype of ''Sagittaria cuneata'' ) *(photo of herbarium specimen at Missouri Botanical Garden, collected in New Mexico, ''Sagittaria cuneata'' ) *(Washington Burke Museum ''Sagittaria cuneata' ) *(Photo gallery ''Sagittaria cuneata' ) *(Washington State Department of Ecology, Shoreline Plants, ''Sagittaria cuneata'' ) *(Plants for a Future, ''Sagittaria cuneata'' ) *(Wildflowers of the Pacific Northwest, Turner Photographics, ''Sagittaria cuneata'' arum-leaf arrowhead ) 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「Sagittaria cuneata」の詳細全文を読む スポンサード リンク
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