Dysphania ambrosioides

(Linnaeus) Mosyakin & Clemants

Ukrayins’k. Bot. Zhurn., n. s. 59: 382. 2002.

Common names: Mexican-tea wormseed
WeedyIllustrated
Basionym: Chenopodium ambrosioides Linnaeus Sp. Pl. 1: 219. 1753
Synonyms: Chenopodium ambrosioides var. suffruticosum (Willdenow) Ascherson & Graebner Teloxys ambrosioides
Treatment appears in FNA Volume 4. Treatment on page 270. Mentioned on page 265, 269.

Plants annual. Stems erect to ascending, much-branched, 3–10 (–15) dm, ± glandular-pubescent. 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). 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. 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. Achenes ovoid; pericarp nonadherent, rugose to smooth. Seeds horizontal or vertical, reddish-brown, ovoid, 0.6–1 × 0.4–0.5 mm; seed-coat rugose to smooth.


Phenology: Fruiting summer–fall.
Habitat: River bottoms, dry lake beds, flower beds, waste areas
Elevation: 0-700 m

Distribution

V4 490-distribution-map.gif

Ont., Que., Ala., Ariz., Ark., Calif., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Miss., Mo., Nebr., N.H., N.J., N.Mex., N.Y., N.C., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., native to North America and South America, widely naturalized throughout the tropics and warm-temperate regions of the world

Discussion

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

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property.

... more about "Dysphania ambrosioides"
gland-dotted +
glandular-pubescent +
Obtuse (?) +, Attenuate (?) +  and Acute (?) +
Steven E. Clemants +  and Sergei L. Mosyakin +
(Linnaeus) Mosyakin & Clemants +
slippery +
aromatic +
cuneate +
Chenopodium ambrosioides +
ovate +  and oblong-lanceolate or lanceolate +
persistent +  and deciduous +
linear +, spatulate +, oblanceolate +, lanceolate +  and leaflike +
reddish-brown +, black +, brown +  and green +
Mexican-tea +  and wormseed +
Ont. +, Que. +, Ala. +, Ariz. +, Ark. +, Calif. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, native to North America and South America +  and widely naturalized throughout the tropics and warm-temperate regions of the world +
0-700 m +
symmetric +, or +  and uniseriate +
unisexual +  and bisexual +
aromatic +
glabrescent +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
River bottoms, dry lake beds, flower beds, waste areas +
foliose +  and linear-spicate +
spicate-paniculate +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
aromatic +
reduced +
not winged +  and winged +
laciniate +  and dentate +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
nonadherent +
rugose;smooth +
membranaceous +
0 cm0 mm <br />0 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Fruiting summer–fall. +
Rounded (?) +  and Ovate (?) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
4 cm40 mm <br />0.04 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Ukrayins’k. Bot. Zhurn., n. s. +
pointing +  and ascending +
basal +, median +  and position +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
rugose +  and smooth +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
vertical +  and horizontal +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Weedy +  and Illustrated +
cylindric +
4 (?) +  and 5 (?) +
much-branched +
opposite +  and alternate +
prostrate +  and decumbent +
erect +  and ascending +
not fleshy +
filiform +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
verrucate +
Chenopodium ambrosioides var. suffruticosum +  and Teloxys ambrosioides +
Dysphania ambrosioides +
Dysphania sect. Adenois +
species +
polygamous +, dioecious +  and monoecious +