Dysphania anthelmintica |
Dysphania chilensis |
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wormseed |
Chilean wormseed |
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Habit | Plants annual. | Plants annual. |
Stems | erect to ascending, branched, 3.7–7.5(–10) dm, ± glandular-pubescent, puberulent, or glabrate. |
erect to ascending, branched, 4–6 dm, ± glandular-pubescent, white-villous. |
Leaves | malodorous, distal leaves sessile; petiole 1.4 mm; blade narrowly ovate to lanceolate, 5–7 × 1.5–3 cm, base cuneate, margins dentate with large, widely spaced teeth, apex acute, gland-dotted (rarely nearly 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 | terminal and lateral spikes or panicles, 3–8 cm; glomerules globose, 2.5–3.3 mm diam.; bracts absent or leaflike, linear, to 2.2 mm, apex acute. |
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 5, connate for ca. 1/2 their length, distinct portion ovate, 0.7 mm, apex obtuse, rounded abaxially, glabrous, covering fruit at maturity; stamens 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. |
Achenes | ovoid; pericarp nonadherent, smooth, glandular. |
ovoid; pericarp nonadherent, glandular. |
Seeds | horizontal or vertical, reddish brown, ovoid, 0.6–0.8 × 0.8–1 mm; seed coat smooth. |
vertical, black, ovoid, 0.5–0.8 × 0.8 mm; seed coat smooth. |
Dysphania anthelmintica |
Dysphania chilensis |
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Phenology | Fruiting summer–fall. | Fruiting summer–fall. |
Habitat | Sand dunes, pinelands, meadows, roadsides, and other waste areas | Waste areas |
Elevation | 0-1100 m (0-3600 ft) | 0-100 m (0-300 ft) |
Distribution |
AL; AR; CA; DE; FL; GA; IL; IN; KS; KY; LA; MA; MD; MO; MS; NC; NJ; NY; OH; OK; PA; SC; TX; VA; WV; Mexico; Central America; West Indies; Bermuda |
CA; OR; native to s South America [Introduced in North America] |
Discussion | Dysphania anthelmintica is cultivated and locally naturalized elsewhere in the world. It is reported to not have leaves (pseudobracts) subtending the glomerules. In fact, it usually has very reduced leaflike bracts that are never longer than the glomerules. This species appears to be the most common representative along the Atlantic and Gulf coasts and is probably native to that region. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 4, p. 270. | FNA vol. 4, p. 270. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Chenopodium anthelminticum, Chenopodium ambrosioides var. anthelminticum | Chenopodium chilense, Chenopodium ambrosioides var. chilense, Chenopodium ambrosioides var. vagans |
Name authority | (Linnaeus) Mosyakin & Clemants: Ukrayins’k. Bot. Zhur n., n. s. 59: 382. (2002) | (Schrader) Mosyakin & Clemants: Ukrayins’k. Bot. Zhurn., n. s. 59: 382. (2002) |
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