Chenopodium carinatum R.Br., Chenopodiaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 9 (Go to the risk assessment)

Other Latin names:  Dysphania carinata (R. Br.) Mosyakin & Clemants

Common name(s): [more details]

English: Tasmanian goosefoot, green crumbweed, keeled goosefoot

Habit:  herb

Description:  "Prostrate or ascending (elsewhere also ± erect) annual herb, 15-35 (elsewhere up to 100) cm long, much branched; stem and branches with short hairs, at least some tipped with yellow glands.  Leaves ± distinctly petioled, elliptic-ovate, 0.5-1.5 x 0.3-0.5 (elsewhere up to 7.5 x 5) cm, with obtuse to acute 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 5, narrowly oblanceolate, about 1.2 mm long, joined in lower half, concave and conspicuously keeled in upper half with truncately triangular crest, hairy, green, ovary with short style and 2 filamentous stigmas.  Fruit enveloped in tepals but not concealed at maturity, whitish, glandless; seed compressed globose and distinctly keeled along most of circumference, vertical or diagonal, about 0.6 mm in diameter, shiny dark brown"  (Henty, 1981; p. 21).

Habitat/ecology:  In Hawai‘i, "naturalized in relatively dry, disturbed sites, 0-1,200 m" (Wagner et al., 1999; p. 537).  In Papua New Guinea, "reported as a weed from an open village space at 500 m altitude and from tobacco cultivation in the Markham Valley"  (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
State of Hawaii Hawaiian Islands	Hawai‘i (Big) Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 537)
State of Hawaii Hawaiian Islands	Kaho‘olawe Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 537)
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced invasive	Lorence, David H./Flynn, Tim (1997) (p. 10) Voucher cited: Carroll 2 (PTBG)
State of Hawaii Hawaiian Islands	Lāna‘i Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 537) Voucher cited: Munro 704 (BISH)
State of Hawaii Hawaiian Islands	Maui Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 537)
State of Hawaii Hawaiian Islands	Moloka‘i Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 537)
State of Hawaii Hawaiian Islands	Ni‘ihau Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 537)
State of Hawaii Hawaiian Islands	O‘ahu Island	introduced invasive	Staples, George W./Imada, Clyde T./Herbst, Derral R. (2003) (p. 10) Voucher cited: M. C. Neal & C. Hartt s.n. (BISH 618401)
Papua New Guinea Papua New Guinea (eastern New Guinea Island)	Papua New Guinea (eastern New Guinea Island)	introduced invasive	Henty, E. E., ed. (1981) (pp. 21-22)

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) Victoria
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., Nat. Res. Cons. Serv. (2013)
United States (west coast) United States (west coast states)	USA (Oregon)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (west coast) United States (west coast states)	USA (California)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (west coast) United States (west coast states)	USA (Washington)	introduced	U.S. Dept. Agr., Nat. Res. Cons. 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
United States (continental except west coast) United States (other states)	United States (other states)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (continental except west coast) United States (other states)	USA (Florida)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)

Control:  If you know of control methods for Chenopodium carinatum, please let us know.