Dysphania multifida (L.) Mosyakin & Clemants, Chenopodiaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Chenopodium multifidum L.; Roubieva multifida (L.) Moq.

Common name(s): [more details]

English: cut-leaf goosefoot, scented goosefoot, small-leaf wormseed

Spanish: chenopodium

Habit:  herb

Description:  "Plants perennial (possibly annual in some parts of its range). Stems prostrate or ascending, much-branched, 1.5-7 dm, densely puberulent. Leaves nonaromatic; petiole absent or indistinguishable from blade; blade oblong to elliptic, 0.6-4.5 x 0.1-1 (-2) cm, base narrowly cuneate, margins deeply and irregularly pinnatifid with narrow, linear lobes, sometimes only dentate, apex acute to obtuse, glandular-pubescent abaxially. Inflorescences: lateral glomerules 1.8-3.5 mm in diameter; bracts similar to cauline leaves. Flowers: perianth segments (4-) 5, connate for most of their length, urceolate, tube with distinct reticulate veins, distinct portion 0.1-0.5 mm, margins dentate, apex rounded to broadly acute, accrescent and coriaceous with age, enclosing fruit; stamens 5; stigmas (2-) 3 (-5). Achenes obovoid; pericarp loosely adherent, membranaceous, with many yellow glandular hairs near apex, otherwise smooth. Seeds vertical, suborbicular to ovoid, 0.8-1.3 x 0.8-1 mm; seed coat smooth"  (Flora of North America online).

Habitat/ecology:  In the United States: "waste ground, sandy shores and ballast dumps near coast; 0-700 m"  (Flora of North America online).

Propagation:  Seed

Native range:  Argentina, Brazil, Chile, Peru, Uruguay (GRIN), "introduced widely throughout the tropical and warm-temperate regions of world"  (Flora of North America online).

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Chile (offshore islands) Juan Fernández Islands	Isla Más a Tierra (Robinson Crusoe Island)	introduced invasive	Atkinson, Rachel/Sawyer, John (2011) As Chenopodium multifidum L.
Chile (offshore islands) Juan Fernández Islands	Isla Más a Tierra (Robinson Crusoe Island)	introduced invasive	Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 553) As Chenopodium multifidum L.
Chile (offshore islands) Juan Fernández Islands	Isla Más Afuera (Alejandro Selkirk Island)	introduced invasive	Atkinson, Rachel/Sawyer, John (2011) As Chenopodium multifidum L.
Chile (offshore islands) Juan Fernández Islands	Isla Más Afuera (Alejandro Selkirk Island)	introduced invasive	Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 553) As Chenopodium multifidum L.

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	introduced invasive	National Herbarium of New South Wales (2011)
Australia Australia (continental)	Queensland	introduced invasive	National Herbarium of New South Wales (2011)
Chile (continental) Chile	Chile (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2011)
Perú Perú	Perú (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2011)
United States (west coast) United States (west coast states)	USA (Oregon)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2011)
United States (west coast) United States (west coast states)	USA (California)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2011)

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. (2011)
United States (continental except west coast) United States (other states)	USA (Florida)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2011)

Additional information:
Additional online information about Dysphania multifida is available from the Hawaiian Ecosystems at Risk project (HEAR).

Information about Dysphania multifida as a weed (worldwide references) may be available from the Global Compendium of Weeds (GCW).

Taxonomic information about Dysphania multifida may be available from the Germplasm Resources Information Network (GRIN).

References:

Atkinson, Rachel/Sawyer, John. 2011. Naturalized species in the Juan Fernández Archipelago, Chile. Unpublished spreadsheet.

Belov, Michail. 2011. Chileflora (online resource).

Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido. 2006. Nouveau catalogue de la flore vaculaire de l'archipel Juan Fernández (Chile) [Nuevo catálogo de la flora vacular del Archipélago Juan Fernández (Chile)]. Acta Bot. Gallica 153(4):399-587.

Flora of North America Editorial Committee, eds. 2011. Flora of North America North of Mexico (online edition).

National Herbarium of New South Wales. 2011. PlantNet: New South Wales Flora online. The Plant Information Network System of the Botanic Gardens Trust Version 2.0. Online resource.

U.S. Dept. Agr., Agr. Res. Serv. 2011. National Genetic Resources Program. Germplasm Resources Information Network (GRIN). Online searchable database.

U.S. Dept. Agr., Nat. Res. Cons. Serv. 2011. The PLANTS Database. National Plant Data Center, Baton Rouge, LA 70874-4490 USA.