Chenopodium glaucum

Linnaeus

Sp. Pl. 1: 220. 1753.

Common names: Oak-leaf goosefoot
Illustrated
Treatment appears in FNA Volume 4. Treatment on page 283. Mentioned on page 276, 279.

Stems erect to prostrate, branched from base, 0.5–2.5(–4) dm, farinose. Leaves nonaromatic; petiole to 1 cm; blade lanceolate to oblong or ovate, 0.5–4 × 0.3–1.5 cm, base cuneate, margins undulate-dentate, teeth obtuse or acute, apex obtuse or acute, densely farinose, glaucous abaxially. Inflorescences glomerules in terminal or lateral spikes, 5–10 cm; glomerules subglobose, 1.8–2.5 mm diam.; bracts leaflike in inflorescence, elliptic, 0.2–1 × 0.1–0.5 cm, or absent at least in terminal 1/2 of inflorescence. Flowers: perianth segments 3–4; lobes obovate to oblong, 0.5–0.7 × 0.4–0.5 mm, apex obtuse, rounded, not keeled, covering fruit at maturity; stamen 1; stigmas 2. Utricles ovoid; pericarp nonadherent, smooth. Seeds mostly horizontal, some vertical, margins rounded; vertical seeds ovoid to round, 0.6–1.1 mm diam.; horizontal seeds round, 0.6–1.1 mm diam.; seed coat reddish brown, rugose-punctate. 2n = 18.

Distribution

V4 523-distribution-map.gif

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

Discussion

Varieties 3 or more (2 in the flora).

Several entities (segregate species, subspecies, varieties, and forms) have been described within the Chenopodium glaucum group. Most of the taxa represent morphological traits of individual or ecological variability and have little or no taxonomic importance. However, several entities are well delimited geographically. The native North American taxon is recognized here as a separate variety.

Selected References

None.

Key

1 Inflorescences without leaflike bracts, at least on terminal 1/2; leaf blade apices obtuse; vertical seeds 0.6-0.9 mm Chenopodium glaucum var. glaucum
1 Inflorescences with leaflike bracts throughout; leaf blade apices acute; vertical seeds 0.9-1.1 mm Chenopodium glaucum var. salinum
... more about "Chenopodium glaucum"
Steven E. Clemants +  and Sergei L. Mosyakin +
Linnaeus +
Undefined subg. Blitum +
Oak-leaf goosefoot +
Alta. +, B.C. +, Man. +, N.B. +, N.S. +, N.W.T. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Conn. +, Del. +, Fla. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Mo. +, Mont. +, N.Dak. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, Nebr. +, Nev. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Utah +, Va. +, Vt. +, W.Va. +, Wash. +, Wis. +, Wyo. +  and Asia. +
Illustrated +
Chenopodium glaucum +
Chenopodium sect. Glauca +
species +