Chenopodium subglabrum |
Chenopodium glaucum |
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smooth goosefoot |
oak-leaf goosefoot |
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Stems | erect or semierect, branched, 1–5.5 dm, glabrous or sparsely farinose. |
erect to prostrate, branched from base, 0.5–2.5(–4) dm, farinose. |
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Leaves | nonaromatic; petiole to 1 cm; blade linear, 1-veined, 1–3(–5) × 0.1–0.2(–0.4) cm, somewhat fleshy, base cuneate, margins entire, apex acute to acuminate, glabrous. |
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. |
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Inflorescences | glomerules in terminal and axillary panicles, 6–25 × 5–20 cm, widely spaced, maturing at different times; bracts variable. |
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. |
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Flowers | perianth segments 5, connate into 0.3–0.4 mm tube; lobes ovate or orbicular-obovate, 1–1.4 mm, apex obtuse or rounded, cucullate, carinate, sparsely farinose, largely covering fruit at maturity; stamens 5; stigmas 2, 0.1 mm. |
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. |
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Achenes | ovoid; pericarp nonadherent, smooth. |
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Seeds | ovoid, 1.2–1.6 mm diam., margins obtuse with narrow rim; seed coat black, smooth, shiny. |
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. |
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Utricles | ovoid; pericarp nonadherent, smooth. |
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2n | = 18. |
= 18. |
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Chenopodium subglabrum |
Chenopodium glaucum |
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Phenology | Fruiting mid summer–fall. | |||||
Habitat | Sandy areas, particularly sand bars in rivers and in sandy blowouts near river banks | |||||
Elevation | 400-1400 m (1300-4600 ft) | |||||
Distribution |
CO; IA; MT; ND; NE; NV; SD; UT; WA; WY; AB; MB; SK
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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.) |
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Key |
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Source | FNA vol. 4, p. 289. | FNA vol. 4, p. 283. | ||||
Parent taxa | Chenopodiaceae > Chenopodium > subg. Chenopodium > sect. Chenopodium > subsect. Leptophylla | Chenopodiaceae > Chenopodium > subg. Blitum > sect. Glauca | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | C. leptophyllum var. subglabrum | |||||
Name authority | (S. Watson) A. Nelson: Bot. Gaz. 34: 362. (1902) | Linnaeus: Sp. Pl. 1: 220. (1753) | ||||
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