Dysphania pumilio (R. Br.) Mosyakin & Clemants, Chenopodiaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Chenopodium pumilio R. Br.

Common name(s): [more details]

English: clammy goosefoot, ridged goosefoot, small crumbweed

Habit:  herb

Description:  "Prostrate or ascending (elsewhere also ± erect) annual herb, 5-15 (elsewhere up to 80) cm long, much branched near base; stem and branches with glandular hairs.  Leaves distinctly petioled, ± narrowly rhombic to ovate, 0.5-1 x 0.2-0.4 (elsewhere up to 4 x 2) cm, with shortly acuminate apex and ± decurrent base, dentate or ± deeply lobed, hairy like branches especially on petiole and nerves.  Inflorescence of clusters of many flowers, not combining into distinct thyrses or panicles.  Tepals (4-) 5, acutely oblanceolate, about 1 mm long, joined in basal quarter, very concave (but not keeled), hairy, green, turning white and dry-membranous; stamens 1-2; ovary with short style and 2 filamentous stigmas.  Fruit enveloped in tepals but not concealed, whitish, glandless; seed compressed globose and keeled along half of circumference, horizontal, about 0.5 mm diameter, shiny dark brown"  (Henty, 1981; p. 23).

Habitat/ecology:  In Papua New Guinea, "reported as a weed from bare patches in grazed grassland at 150 m altitude"  (Henty, 1981; p. 23).

Propagation:  Seed

Native range:  Australia (Henty, 1981; p. 23).

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Papua New Guinea Papua New Guinea (eastern New Guinea Island)	Papua New Guinea (eastern New Guinea Island)	introduced invasive	Henty, E. E., ed. (1981) (p. 23) As Chenopodium pumilio.

Pacific Rim
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Australia Australia (continental)	New South Wales	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Australia Australia (continental)	Australia (continental)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013) South Australia, Tasmania, Victoria, Western Australia
Australia Australia (continental)	Northern Territory	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Australia Australia (continental)	Queensland	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
British Columbia (province of Canada) Province of British Columbia	Canada (British Columbia)	introduced	U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan Japan	Japan	introduced invasive	U.S. Dept. Agr., Agr. Res. Serv. (2013) Natualized
New Zealand New Zealand	New Zealand (country)	introduced invasive	Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 528) As Chenopodium pumilio "Cultivated ground, open waste places, sometimes coastal on dunes and similar sandy areas".
United States (west coast) United States (west coast states)	USA (Oregon)	introduced	U.S. Dept. Agr., Agr. Res. Serv. (2013)
United States (west coast) United States (west coast states)	USA (California)	introduced	U.S. Dept. Agr., Agr. Res. Serv. (2013)
United States (west coast) United States (west coast states)	USA (Washington)	introduced	U.S. Dept. Agr., Agr. Res. Serv. (2013)

Also reported from
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Canada Canada	Canada	introduced	U.S. Dept. Agr., Agr. Res. Serv. (2013)
United States (continental except west coast) United States (other states)	United States (other states)	introduced	U.S. Dept. Agr., Agr. Res. Serv. (2013)
United States (continental except west coast) United States (other states)	USA (Florida)	introduced	U.S. Dept. Agr., Agr. Res. Serv. (2013)

Control:  If you know of control methods for Dysphania pumilio, please let us know.