Achyranthes japonica

(Miquel) Nakai

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

Common names: Japanese chaff-flower
Introduced
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

Distribution

V4 857-distribution-map.gif

Introduced; Ky., Ohio, W.Va., Asia

Discussion

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

Lower Taxa

None.
... more about "Achyranthes japonica"
glabrescent +, glabrous +, short-pubescent +  and pubescent +
Kenneth R. Robertson +
(Miquel) Nakai +
tapering +
Achyranthes bidentata var. japonica +
ovate +  and orbiculate or broadly rhombate +
Japanese chaff-flower +
Ky. +, Ohio +, W.Va. +  and Asia +
100-200 m +
peripheral +
spaced +  and crowded +
hypogynous +
minute +  and small +
indurate +  and coriaceous +
not +  and dehiscent +
Wooded riverbanks +
many-flowered +  and pedunculate +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (13.5 cm135 mm <br />0.135 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (6.8 cm68 mm <br />0.068 m <br />) +
turbinate +  and obovoid +
few-branched +  and simple +
Flowering summer. +
2-lobed +  and denticulate +
Bot. Mag. (Tokyo) +
medley1985a +
ovoid +  and obovoid +
Introduced +
erect +  and ascending +
75 cm750 mm <br />0.75 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
elongate +
Achyranthes japonica +
Achyranthes +
species +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
cylindric +  and elliptic +
2.5 cm25 mm <br />0.025 m <br /> (?) +
membranous +