Dysphania ambrosioides |
Dysphania chilensis |
|
|---|---|---|
|
epazote, Mexican-tea, worm-seed |
Chilean wormseed |
|
| Habit | Plants annual. | Plants annual. |
| Stems | erect to ascending, much-branched, 3–10(–15) dm, ± glandular-pubescent. |
erect to ascending, branched, 4–6 dm, ± glandular-pubescent, white-villous. |
| 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). |
aromatic, distal leaves sessile; petiole 2–2.5 mm; blade lanceolate, 2–9 × 0.5–4 cm, base cuneate, margins of distal leaves shallowly dentate to sinuate-pinnatifid, apex acuminate, villous and copiously gland-dotted (rarely nearly glabrous). |
| 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. |
terminal and axillary spikes, 3–15 cm; glomerules globose, 1.7–2.3 mm diam.; bracts leaflike, narrowly ovate, 1–1.8 cm, apex acuminate. |
| 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, connate for ca. 1/2 their length, distinct portion ovate, 0.7–1 mm, apex obtuse, rounded abaxially, villous, covering fruit at maturity; stamens 5; stigmas 3. |
| Seeds | horizontal or vertical, reddish brown, ovoid, 0.6–1 × 0.4–0.5 mm; seed coat rugose to smooth. |
vertical, black, ovoid, 0.5–0.8 × 0.8 mm; seed coat smooth. |
| Achenes | ovoid; pericarp nonadherent, rugose to smooth. |
ovoid; pericarp nonadherent, glandular. |
Dysphania ambrosioides |
Dysphania chilensis |
|
| Phenology | Fruiting summer–fall. | Fruiting summer–fall. |
| Habitat | River bottoms, dry lake beds, flower beds, waste areas | Waste areas |
| Elevation | 0-700 m [0-2300 ft] | 0-100 m [0-300 ft] |
| Distribution |
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
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CA; OR; native to s South America [Introduced in North America] |
| 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.) |
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| Parent taxa | ||
| Sibling taxa | ||
| Synonyms | Chenopodium ambrosioides, Chenopodium ambrosioides var. suffruticosum, Teloxys ambrosioides | Chenopodium chilense, Chenopodium ambrosioides var. chilense, Chenopodium ambrosioides var. vagans |
| Name authority | (Linnaeus) Mosyakin & Clemants: Ukrayins’k. Bot. Zhurn., n. s. 59: 382. (2002) | (Schrader) Mosyakin & Clemants: Ukrayins’k. Bot. Zhurn., n. s. 59: 382. (2002) |
| Source | FNA vol. 4, p. 270. | FNA vol. 4, p. 270. |
| Web links |
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