Achyranthes japonica

(Miquel) Nakai

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

Common names: Japanese chaff-flower
Basionyms: Achyranthes bidentata japonica
Found 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


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.

Facts about "Achyranthes japonica"
AuthorKenneth R. Robertson +
BasionymAchyranthes bidentata japonica +
Common nameJapanese chaff-flower +
Elevation100-200 m +
HabitatWooded riverbanks +
IllustratorYevonn Wilson-Ramsey +
PhenologyFlowering summer. +
Referencemedley1985a +
Taxon nameAchyranthes japonica +
Taxon parentAchyranthes +
Taxon rankspecies +
VolumeVolume 4 +