Japanese chaff flower USDA PLANTS Symbol: ACJA
U.S. Nativity: Exotic
Habit: Forbs/Herbs
Achyranthes japonica (Miq.) Nakai

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Taxonomic Rank: Magnoliopsida: Caryophyllales: Amaranthaceae

Appearance
Achyranthes japonica is a perennial herb that can grow up to about 6.5 ft. (2 m) tall. Stems are glabrous or slightly pubescent.
Foliage
Ovate-elliptic leaves are opposite and simple. Margins are entire and repand (slightly wavy). The base of the leaf is tapering and the apex is acute to acuminate.
Flowers
The small flowers have no petals and are clustered tightly on the inflorescence which occur at the ends of the stems and upper branches. They flower in summer.
Fruit
The fruits are elliptic utricles that are held tightly along the stem. Fruits contain a single seed and each plant produces many seeds. Each fruit has a pair of stiff bracts that can attach to fur or clothing, allowing the seed to be easily spread.
Ecological Threat
Although Achyranthes japonica prefers partial sun and moist soils it can survive in shade and dry conditions. It readily invades bottomland forests, wooded riverbanks, roadsides, ditches and field edges. Achyranthes japonica can form dense monocultures shading and outcompeting native plant species.

Identification, Biology, Control and Management Resources

Selected Images from Invasive.orgView All Images at Invasive.org


Plant(s);
Chris Evans, University of Illinois, Bugwood.org
Additional Resolutions & Image Usage

Fruit(s);
Chris Evans, University of Illinois, Bugwood.org
Additional Resolutions & Image Usage

Foliage;
Chris Evans, University of Illinois, Bugwood.org
Additional Resolutions & Image Usage

Infestation;
Chris Evans, University of Illinois, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Chris Evans, University of Illinois, Bugwood.org
Additional Resolutions & Image Usage

Foliage;
Chris Evans, University of Illinois, Bugwood.org
Additional Resolutions & Image Usage

Fruit(s);
Chris Evans, University of Illinois, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Chris Evans, University of Illinois, Bugwood.org
Additional Resolutions & Image Usage

Plant(s);
Chris Evans, University of Illinois, Bugwood.org
Additional Resolutions & Image Usage

Foliage;
Chris Evans, University of Illinois, Bugwood.org
Additional Resolutions & Image Usage

Foliage; Deer browse
Chris Evans, University of Illinois, Bugwood.org
Additional Resolutions & Image Usage

Seed(s); Pathway: Sticking to dog's fur
Chris Evans, University of Illinois, Bugwood.org
Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.


Invasive Listing Sources:
Georgia Exotic Pest Plant Council