Northeastern Asian Flora
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Rumex obtusifolius L.   (redirected from: Lapathum obtusifolium (L.) Moench)
Family: Polygonaceae
[Lapathum obtusifolium (L.) Moench, moreLapathum sylvestre Lam., Rumex crispatulus Michx., Rumex friesii Gren. & Godr., Rumex obtusifolius subsp. agrestis (Fr.) Danser, Rumex obtusifolius var. agrestis Fr., Rumex rugelii Meisn.]
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  • Japan Flora
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Japan Flora: Perennial herb with hair like papillae on the leaves beneath especially on the nerves; stems stout, 30-80 cm. long; radical leaves long-petioled, oblong, ovate, or broadly so, 15-20 cm. long, 8-12 cm. wide, obtuse to acute, cordate; inflorescence leafy, with ascending branches; outer sepals spreading, about 1.5 mm. long, the inner narrowly deltoid-ovate or ovate-orbicular, subacute, 4-6 mm. long, 3-5 mm. wide, with rather prominent netted veinlets, short-spined or toothed on margin, the tubercles ovoid, 1.5-2 mm. long; achenes dark brown, ovate, acutely 3-angled, lustrous, about 2.5 mm. long. June-Sept.

Hokkaido, Honshu; very variable. Eurasia and N. Africa.

Rumex obtusifolius
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Development supported by College of Agriculture and Life Sciences of Seoul
National University and Korea National Arboretum of Korea Forest Service.
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