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・ Polygonum chinense
・ Polygonum cognatum
・ Polygonum douglasii
・ Polygonum engelmannii
・ Polygonum erectum
・ Polygonum fowleri
・ Polygonum glaucum
・ Polygonum heterosepalum
・ Polygonum hickmanii
・ Polygonum humifusum
・ Polygonum majus
・ Polygonum marinense
・ Polygonum minimum
・ Polygonum nuttallii
・ Polygonum oxyspermum
Polygonum paronychia
・ Polygonum parryi
・ Polygonum patulum
・ Polygonum pensylvanicum
・ Polygonum plebeium
・ Polygonum polygaloides
・ Polygonum polymorphum
・ Polygonum ramosissimum
・ Polygonum sawatchense
・ Polygonum shastense
・ Polygonum spergulariiforme
・ Polygonum striatulum
・ Polygonum tenue
・ Polygonum utahense
・ Polygonus


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Polygonum paronychia : ウィキペディア英語版
Polygonum paronychia

''Polygonum paronychia'' is a species of flowering plant in the knotweed family known by the common names dune knotweed, black knotweed, and beach knotweed.〔 It is native to the coastline of western North America from British Columbia to California, where it grows in sandy coastal habitat such as beaches, dunes, and scrub.〔(Biota of North America Program 2014 county distribution map )〕〔(Calflora taxon report, University of California, ''Polygonum paronychia'' Cham. & Schldl., Dune Knotweed, beach knotweed )〕〔(Turner Photographics, ''Polygonum paronychia'' - Wildflowers of the Pacific Northwest ) photos, description, partial distribution map〕
==Description==
''Polygonum paronychia'' is a small prostrate or upright shrub producing multibranched brown stems up to a meter (40 inches) long. The stems may root at nodes that come in contact with moist substrate. The leaves are alternately arranged on the stems but are mostly located bunched around the tips of the stem branches. The leaves are linear to lance-shaped with rolled edges and bristly midribs on the undersides. Each leaf has a large stipule which forms a wide, membranous ochrea. The ochrea is up to 2 centimeters (0.8 inches) long and is persistent, fraying into fibrous, silvery shreds that remain on the plant through the seasons. Flowers occur in the leaf axils. Each is up to a centimeter (0.4 inches) wide with five narrow white or pinkish corolla lobes.〔(Flora of North America, ''Polygonum paronychia'' Chamisso & Schlechtendal, 1828. Beach or black or dune knotweed )〕

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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