Achyranthes japonica

(Miquel) Nakai

Bot. Mag. (Tokyo) 34: 39. 1920.

Common names: Japanese chaff-flower
Basionym: Achyranthes bidentata var. japonica Miquel Ann. Mus. Bot. Lugduno-Batavi 2: 132. 1865
Treatment appears in FNA Volume 4. Treatment on page 437. Mentioned on page 435.

Plants perennial. Stems 0.75–1.5 m, glabrous or slightly pubescent. Leaf blades ovate-elliptic, 2.5–13.5 × 0.2–6.8 cm, base tapering, apex acute to acuminate, pubescent on veins abaxially, short-pubescent adaxially, varying to glabrous or glabrescent. Inflorescences 2–4 cm in flower, elongating to 21 cm in fruit; bracteoles spinose; basal wings attached at base and sometimes slightly on sides. Flowers: tepals 5, 4–5 mm; pseudostaminodes with margins entire, denticulate, or slightly 2-lobed at apex. Utricles elliptic, 2.5 mm.

Phenology: Flowering summer.
Habitat: Wooded riverbanks
Elevation: 100-200 m


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Introduced; Ky., Ohio, W.Va., Asia.


The plants of Achyranthes japonica in our area evidently belong to var. hachijoensis Honda, which has glabrous or glabrescent leaves.

Lower Taxa