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epazote, Mexican-tea, worm-seed

Australian goosefoot, clammy glandular-goosefoot, clammy goosefoot, small crumbweed, Tasmanian goosefoot

Habit Plants annual.
Stems

erect to ascending, much-branched, 3–10(–15) dm, ± glandular-pubescent.

prostrate to suberect, much-branched to ± simple, 0.1–4.5 dm, pilose with segmented (uniseriate) hairs and sessile or stipitate glandular hairs.

Leaves

aromatic, distal leaves sessile;

petiole to 18 mm;

blade ovate to oblong-lanceolate or lanceolate, proximal ones mostly lanceolate, 2–8(–12) × 0.5–4(–5.5) cm, base cuneate, margins entire, dentate, or laciniate, apex obtuse to attenuate, copiously gland-dotted (rarely glabrous).

malodorous;

petiole 0.3–1.5 cm;

blade narrowly to broadly elliptic to ovate, 0.5–2.7 × 0.3–1.5 cm, somewhat reduced in inflorescence, base cuneate, apex obtuse, glandular-pilose.

Inflorescences

lateral spikes, 3–7 cm;

glomerules globose, 1.5–2.3 mm diam.;

bracts leaflike, lanceolate, oblanceolate, spatulate, or linear, 0.3–2.5 cm, apex obtuse, acute, or attenuate.

lateral cymes or glomerules;

glomerules subglobose, 1.2–2.5 mm diam.;

bracts leaflike, 3–4.5 mm, elliptic, margins crenate-dentate, apex obtuse.

Flowers

perianth segments 4–5, connate for ca. 1/2 their length, distinct portion ovate, rounded abaxially, 0.7–1 mm, apex obtuse, glandular-pubescent, covering seed at maturity;

stamens 4–5;

stigmas 3.

perianth segments 5, distinct nearly to base, distinct portions narrowly elliptic to narrowly oblong, 0.6–0.7 × 0.2–0.3 mm, apex acute, normally rounded abaxially, usually glandular-pilosulose, becoming crustaceous and white in fruit;

stamens absent or 1;

stigmas 2.

Achenes

ovoid;

pericarp nonadherent, rugose to smooth.

ovoid;

pericarp adherent, membranaceous, slightly rugose.

Seeds

horizontal or vertical, reddish brown, ovoid, 0.6–1 × 0.4–0.5 mm;

seed coat rugose to smooth.

reddish brown, ovoid, 0.5–0.7 × 0.5–0.6 mm, margins keeled or rounded;

seed coat smooth.

Dysphania ambrosioides

Dysphania pumilio

Phenology Fruiting summer–fall. Fruiting late summer–fall.
Habitat River bottoms, dry lake beds, flower beds, waste areas Waste areas on rocky, sandy, or gravelly soils, sidewalks, rare in moist soils in forests
Elevation 0-700 m (0-2300 ft) 0-1200 m (0-3900 ft)
Distribution
from FNA
AL; AR; AZ; CA; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MO; MS; NC; NE; NH; NJ; NM; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; ON; QC; native to North America and South America; widely naturalized throughout the tropics and warm-temperate regions of the world
[WildflowerSearch map]
[BONAP county map]
from FNA
AR; CA; CT; DC; FL; GA; IL; KS; KY; LA; MA; MO; NJ; NV; NY; OH; OK; OR; PA; RI; SC; TN; TX; VA; WA; WI; Australia [Introduced in North America; introduced in subtropical and warm-temperate regions]
[WildflowerSearch map]
[BONAP county map]
Discussion

Southern populations of Dysphania ambrosioides are native while those populations in the northern part of the flora area are introduced.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

This species has gone under the misapplied name Chenopodium carinatum R. Brown (now 9. Dysphania carinata).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 4, p. 270. FNA vol. 4, p. 274.
Parent taxa Chenopodiaceae > Dysphania > sect. Adenois Chenopodiaceae > Dysphania > sect. Orthospora
Sibling taxa
D. anthelmintica, D. aristata, D. botrys, D. carinata, D. chilensis, D. cristata, D. graveolens, D. multifida, D. pumilio
D. ambrosioides, D. anthelmintica, D. aristata, D. botrys, D. carinata, D. chilensis, D. cristata, D. graveolens, D. multifida
Synonyms Chenopodium ambrosioides, Chenopodium ambrosioides var. suffruticosum, Teloxys ambrosioides Chenopodium pumilio, Teloxys pumilio
Name authority (Linnaeus) Mosyakin & Clemants: Ukrayins’k. Bot. Zhurn., n. s. 59: 382. (2002) (R. Brown) Mosyakin & Clemants: Ukrayins’k. Bot. Zhurn., n. s. 59: 382. (2002)
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