Pacific Island Ecosystems at Risk (PIER)

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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)
Australia (continental) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
South Australia, Tasmania, Victoria, Western Australia
Australia
Australia (continental)
New South Wales native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
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)
Canada (British Colombia)
Province of British Columbia
Canada (British Columbia) introduced
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan
Japan
Japan (country) 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 (except British Colombia)
Canada
Canada (country) 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)


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This page was created on 18 FEB 2007 and was last updated on 28 MAR 2007.