Chenopodium glaucum |
Chenopodium chenopodioides |
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oak-leaf goosefoot |
buttered goosefoot, goosefoot, low goosefoot |
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Stems | erect to prostrate, branched from base, 0.5–2.5(–4) dm, farinose. |
erect to prostrate, much-branched, 0.1–3.5 dm, glabrous. |
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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. |
nonaromatic; petiole to 0.28 cm; blade deltate or narrowly deltate, 0.8–6 × 0.2–3.5 cm, base cuneate, margins entire or broadly dentate, apex acute to obtuse. |
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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. |
lateral glomerules sessile on lateral branched spikes; glomerules subglobose, 3–4 mm diam.; bracts oblanceolate to linear, 0.2–1.5 cm. |
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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. |
perianth segments 3, connate almost to apex into 0.5–0.8 mm tube; lobes deltate, 0.1–0.5 × 0.3–0.4 mm, membranous, apex acute, flat or occasionally keeled-corniculate, glabrous, green and covering fruit at maturity; stamen 1; stigmas 2, 0.2 mm. |
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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. |
vertical and horizontal, ovoid, 0.6–0.9 mm diam., margins rounded; seed coat black, smooth. |
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Utricles | ovoid; pericarp nonadherent, smooth. |
ovoid; pericarp nonadherent, reticulate-punctate. |
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2n | = 18. |
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Chenopodium glaucum |
Chenopodium chenopodioides |
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Phenology | Fruiting summer–fall. | |||||
Habitat | Borders of lakes and ponds, lake bottoms, in fields | |||||
Elevation | 100-2400 m (300-7900 ft) | |||||
Distribution |
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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CA; CO; NV; OR; UT; WA; WY; South America
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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.) |
The name Chenopodium botryodes Smith was sometimes applied to C. chenopodioides because of uncertainty about the proper application and typification of the name Blitum chenopodioides Linnaeus. The recent publication by P. Uotila (2001) provides a reasonable solution by maintaining the traditional usage through neotypification of the Linnaean name. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 4, p. 283. | FNA vol. 4, p. 282. | ||||
Parent taxa | Chenopodiaceae > Chenopodium > subg. Blitum > sect. Glauca | Chenopodiaceae > Chenopodium > subg. Blitum > sect. Pseudoblitum | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Blitum chenopodioides, C. botryodes, C. chenopodioides var. degenianum, C. crassifolium | |||||
Name authority | Linnaeus: Sp. Pl. 1: 220. (1753) | (Linnaeus) Aellen: in C. Osten et al., Ostenia, 98. (1933) | ||||
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