Northeastern Asian Flora
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Ixeridium dentatum (Thunb.) Tzvelev   (redirected from: Ixeris dentata var. atropurpurea Nakai)
Family: Asteraceae
[Chondrilla dentata (Thunb.) Poir., moreIxeridium dentatum f. albiflorum (Makino) H.Hara, Ixeridium dentatum f. amplifolium (Kitam.) H.Nakai & H.Ohashi, Ixeridium dentatum f. stoloniferum (Kitam.) Yonek., Ixeridium dentatum subsp. kimuranum (Kitam.) Pak & Kawano, Ixeridium dentatum subsp. kitayamense (Murata) Pak & Kawano, Ixeridium dentatum subsp. nipponicum (Nakai) Pak & Kawano, Ixeridium dentatum subsp. ozense (Sugim.) Yonek., Ixeridium dentatum subsp. shiranense (Kitam.) Pak & Kawano, Ixeridium dentatum var. albiflorum (Makino) H.Nakai & H.Ohashi, Ixeridium kurilense Barkalov, Ixeris albiflora A.Gray, Ixeris dentata (Thunb.) Nakai, Ixeris dentata f. albiflora H.Hara, Ixeris dentata f. amplifolia (Kitam.) Hiyama, Ixeris dentata f. atropurpurea (Nakai) H.Hara, Ixeris dentata subsp. alpicola (Takeda) Kitam., Ixeris dentata subsp. kimurana Kitam., Ixeris dentata subsp. kitayamensis Murata, Ixeris dentata subsp. nikoensis Kitam., Ixeris dentata subsp. nipponica (Nakai) Kitam., Ixeris dentata subsp. shiranensis Kitam., Ixeris dentata subsp. stolonifera Kitam., Ixeris dentata var. albiflora (Makino) Nakai, Ixeris dentata var. alpicola (Takeda) Ohwi, Ixeris dentata var. amplifolia Kitam., Ixeris dentata var. atropurpurea Nakai, Ixeris dentata var. kimurana (Kitam.) Ohwi, Ixeris dentata var. kiusiana Nakai, Ixeris dentata var. lanceolata Makino, Ixeris dentata var. leucantha H.Hara, Ixeris dentata var. lobata Nakai, Ixeris dentata var. octoradiata Nakai, Ixeris dentata var. ozensis Sugim., Ixeris dentata var. stolonifera Nemoto, Ixeris nipponica Nakai, Ixeris thunbergii A.Gray, Lactuca dentata (Thunb.) C.B.Rob., Lactuca dentata var. thunbergii Makino, Lactuca thunbergii (A.Gray) Maxim., Lactuca thunbergii var. albiflora Makino, Lactuca thunbergii var. flaviflora Makino, Prenanthes dentata Thunb., Youngia dentata (Thunb.) DC.]
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  • Japan Flora
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Japan Flora: Peren­nial herb with short rhizomes, rarely with short stolons; stems erect, 20-50 cm. long, rather slender, few-leaved; radical leaves broadly linear to oblong-lanccolatc, rarely oblong, long- pctiolatc, the blades 3-10 cm. long, 5-30 mm. wide, acute to acuminate, rarely rounded and mucronate, entire or remotely mucronate-toothcd, rarely shallowly incised; cauline leaves rather short, sessile, auriculate<lasping; heads in loose cor­ymbs, about 15 mm. across, yellow or rarely white, usually 5-flowered; involucres 7-9 mm. long, the inner bracts 5-6; achenes 3-3.5 mm. long, beak less than 1 mm. long; pappus brown, about 4 mm. long;May-July. Sunny places in low­ lands and low mountains.

Hokkaido, Honshu, Shikoku, Kyu­shu; very common.s. Kuriles, Ryukyus, and Korea.

var. albiflora (Makino) Nakai. Plant somewhat larger; leaves slightly broader; florets 7-8, the corollas white. Mountains; Hokkaido, Honshu.

f. amplifolia (Kitam.) Hiyama. Corollas yellow; more common than the white-flowered phase. 

var. alpicola (Takeda) Ohwi. Stems low; leaves narrower, shorter; heads fewer, about 1 cm. long, the florets 6-9, yellow; achenes slightly longer. Rocky alpine slopes; Hokkaido, Honshu, Shikoku, Kyushu (Yakushima).

var. kimurana (Kitam.) Ohwi. Alpine phase intermediate between var. alpicola and var. albiflora

f. albescens Kitam. Flowers white. Alpine.

var. stolonifera (Kitam.) Nemoto. Stems creeping; florets 5 in a head. Honshu, Shikoku, Kyushu.

Ixeridium dentatum
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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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