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・ Eupatorium
・ Eupatorium album
・ Eupatorium altissimum
・ Eupatorium amabile
・ Eupatorium anomalum
・ Eupatorium benguetense
・ Eupatorium camiguinense
・ Eupatorium cannabinum
・ Eupatorium capillifolium
・ Eupatorium chinense
・ Eupatorium compositifolium
・ Eupatorium formosanum
・ Eupatorium fortunei
・ Eupatorium godfreyanum
・ Eupatorium hyssopifolium
Eupatorium japonicum
・ Eupatorium lancifolium
・ Eupatorium leptophyllum
・ Eupatorium leucolepis
・ Eupatorium lindleyanum
・ Eupatorium linearifolium
・ Eupatorium luchuense
・ Eupatorium macrocephalum
・ Eupatorium mikanioides
・ Eupatorium mohrii
・ Eupatorium nodiflorum
・ Eupatorium novae-angliae
・ Eupatorium paludicola
・ Eupatorium perfoliatum
・ Eupatorium pilosum


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Eupatorium japonicum : ウィキペディア英語版
Eupatorium japonicum

''Eupatorium japonicum'', called in Chinese 白头婆 bai tou po,〔(【引用サイトリンク】 work = Chinese Plant Names )〕 is a herbaceous plant species in Asteraceae. It is native to China, Japan and Korea.
==Description==

''Eupatorium japonicum'' is a herbaceous perennial growing 50–200 cm tall from short rhizomes with many fibrous roots. The stems are upright and marked with purplish red, ending with simple or corymbose, (flat) inflorescence that branch near their ends. The leaves are oppositely arranged on the stems and have short but rather thick petioles that are 1–2 cm long. The leaves midway up the stems are elliptic, narrowly elliptic, ovate-elliptic, or lanceolate in shape and 6 to 20 long and 2 to 6.5 cm wide. The leaves are pinnately veined, with lateral veins 7-paired, the undersides of the leaves have prominent veining. The Leaves gradually tapper to a sharp point and the bases are broad or narrow, and the leaf margins are sometimes 3-partite. Before flowering, the basel foliage withers away. The upper leaves of the stems are the same shape but smaller than those below them. The foliage is scabrid, crisped-villous or puberulent with yellow glandular hairs. Leaf margins are coarsely or double-serrate. The flowers are collected together into capitula (heads) that are densely corymbose, the inflorescence are usually 3 to 6 cm wide and rarely form large compound corymbose inflorescence that can be up to 20 cm wide. The involucre are campanulate shaped and 5–6 mm wide, composed of five flowers. The lanceolate shaped phyllaries are imbricate, with 3-seriate edges, the outer phyllaries are very short, only 1–2 mm wide, and green or purple-tinged. The florets are white, red-purple, or pink, with corolla about 5 mm wide and the corolla is covered with yellow glands. The fruits are black-brown, 5-angled, hairless achenes, that are elliptic in shape and about 3.5 mm long, and are covered with yellow glands. The 5 mm long pappus are white. This species blooms and fruits from June to November.

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「Eupatorium japonicum」の詳細全文を読む



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