Chenopodium simplex

(Torrey) Rafinesque

Atlantic J. 1: 146. 1832.

Common names: Maple-leaf goosefoot
WeedyIllustratedEndemic
Basionym: Chenopodium hybridum var. simplex Torrey Ann. Lyceum Nat. Hist. New York 2: 239. 1827 Chenopodium gigantospermum Aellen C. hybridum subsp. gigantospermum (Aellen) Hultén, C. hybridum var. gigantospermum (Aellen) Rouleau
Treatment appears in FNA Volume 4. Treatment on page 284. Mentioned on page 276, 285.

Stems erect, branched, 3–15 dm, glabrous. Leaves nonaromatic; petiole 0.15–0.45 cm; blade ovate to triangular, 3.5–15 × 2–9 cm, base cordate to truncate, margins sinuate-dentate with 1–5 coarse, acute teeth, distal leaves entire or with few small teeth, apex acute, glabrous. Inflorescences glomerules in terminal and lateral spikes and panicles, 6–15 cm; glomerules irregularly globose, flowers in different stages of development, 0.5–2 mm diam.; bracts absent. Flowers: perianth segments 5, connate into 0.5 mm tube; lobes ovate to lanceolate, 0.7–1 × 0.4–0.6 mm, apex retuse, slightly keeled, glabrous, margins meeting or separated by as much as their width, exposing more than 1/2 fruit at maturity; stamens 5; stigmas 2, 0.1 mm. Achenes depressed-ovoid; pericarp adherent, chartaceous, smooth. Seeds lenticular, 1.3–1.9 mm diam.; seed-coat black, indistinctly honeycombed to nearly smooth, margins rounded. 2n = 18.


Phenology: Fruiting Jul–Oct.
Habitat: Woods, thickets, hardwood slopes, wooded tallus, nutrient-rich woods, sometimes in waste places and fields
Elevation: 0-1800 m

Distribution

V4 528-distribution-map.gif

Alta., B.C., Man., N.B., N.W.T., N.S., Ont., Que., Sask., Yukon, Alaska, Ark., Calif., Colo., Conn., Del., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Pa., R.I., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.

Discussion

A closely related Eurasian diploid species, Chenopodium hybridum Linnaeus, probably also occurs in North America as introduced. Its occurrence in the New World needs confirmation. Chenopodium simplex differs from its Eurasian counterpart in having a smoother seed coat, a yellowish pericarp that is more adherent to the seed, and a different chromosome number (A. I. Baranov 1964; R. D. Dorn 1988b).

Selected References

None.

Lower Taxa

None.

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

... more about "Chenopodium simplex"
dehiscent +  and indehiscent +
depressed-ovoid +
Keeled (?) +, Retuse (?) +  and Acute (?) +
Steven E. Clemants +  and Sergei L. Mosyakin +
(Torrey) Rafinesque +
slippery +
aromatic +
cordate to truncate +
Chenopodium hybridum var. simplex +  and Chenopodium gigantospermum +
3.5 cm35 mm <br />0.035 m <br /> (15 cm150 mm <br />0.15 m <br />) +
ovate +  and triangular +
2cm;9cm +
persistent +  and deciduous +
reddish-brown +, black +, brown +  and green +
Maple-leaf goosefoot +
Alta. +, B.C. +, Man. +, N.B. +, N.W.T. +, N.S. +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Pa. +, R.I. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +  and Wyo. +
0-1800 m +
hippocrepiform +  and annular +
symmetric +, or +  and uniseriate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
dehiscent +  and indehiscent +
/2 (?) +  and 1 (?) +
Woods, thickets, hardwood slopes, wooded tallus, nutrient-rich woods, sometimes in waste places and fields +
small white +
inflated +
6 cm60 mm <br />0.06 m <br /> (15 cm150 mm <br />0.15 m <br />) +
sessile +  and petiolate +
nonaromatic +
not fleshy +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
ovate +  and lanceolate +
0.4mm;0.6mm +
not winged +  and winged +
separated +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
chartaceous +  and membranaceous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Fruiting Jul–Oct. +
Atlantic J. +
pointing +  and ascending +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
indistinctly honeycombed +  and nearly smooth +
0.13 cm1.3 mm <br />0.0013 m <br /> (?) +  and 0.19 cm1.9 mm <br />0.0019 m <br /> (?) +
lenticular +
Weedy +, Illustrated +  and Endemic +
cylindric +
not imbricate +
keeled +  and rounded +
opposite +  and alternate +
not fleshy +
filiform +
0.1 cm1 mm <br />0.001 m <br /> (?) +  and 2 cm20 mm <br />0.02 m <br /> (?) +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
verrucate +
Chenopodium simplex +
Chenopodium sect. Grossefoveata +
species +
0.5 cm5 mm <br />0.005 m <br /> (?) +
dehiscent +  and indehiscent +
glabrous +  and pubescent +
polygamous +, dioecious +  and monoecious +
not imbricate +
keeled +  and rounded +