Flora of North America species comparison

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Chenopodium glaucum

oak-leaf goosefoot
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.
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.
Utricles

ovoid;

pericarp nonadherent, smooth.
2n

= 18.

Chenopodium glaucum
Distribution
from FNA
AK; AZ; CA; CO; CT; DE; FL; IA; ID; IL; IN; KS; KY; MA; MD; ME; MI; MN; MO; MT; ND; NE; NH; NJ; NM; NV; NY; OH; OR; PA; RI; SD; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NS; NT; ON; PE; QC; SK; YT; Asia
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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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Inflorescences without leaflike bracts, at least on terminal 1/2; leaf blade apices obtuse; vertical seeds 0.6-0.9 mm
var. glaucum
1. Inflorescences with leaflike bracts throughout; leaf blade apices acute; vertical seeds 0.9-1.1 mm
var. salinum
Source FNA vol. 4, p. 283.
Parent taxa Chenopodiaceae > Chenopodium > subg. Blitum > sect. Glauca
Sibling taxa
C. albescens, C. album, C. atrovirens, C. berlandieri, C. bonus-henricus, C. californicum, C. capitatum, C. chenopodioides, C. cycloides, C. desiccatum, C. ficifolium, C. foggii, C. foliosum, C. fremontii, C. hians, C. incanum, C. leptophyllum, C. macrospermum, C. murale, C. neomexicanum, C. nevadense, C. opulifolium, C. pallescens, C. polyspermum, C. pratericola, C. rubrum, C. simplex, C. standleyanum, C. strictum, C. subglabrum, C. urbicum, C. vulvaria, C. watsonii
Subordinate taxa
C. glaucum var. glaucum, C. glaucum var. salinum
Name authority Linnaeus: Sp. Pl. 1: 220. (1753)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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