Chenopodium subglabrum |
Chenopodium chenopodioides |
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smooth goosefoot |
buttered goosefoot, goosefoot, low goosefoot |
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Stems | erect or semierect, branched, 1–5.5 dm, glabrous or sparsely farinose. |
erect to prostrate, much-branched, 0.1–3.5 dm, glabrous. |
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 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. |
Inflorescences | glomerules in terminal and axillary panicles, 6–25 × 5–20 cm, widely spaced, maturing at different times; bracts variable. |
lateral glomerules sessile on lateral branched spikes; glomerules subglobose, 3–4 mm diam.; bracts oblanceolate to linear, 0.2–1.5 cm. |
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, 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. |
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. |
vertical and horizontal, ovoid, 0.6–0.9 mm diam., margins rounded; seed coat black, smooth. |
Utricles | ovoid; pericarp nonadherent, reticulate-punctate. |
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2n | = 18. |
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Chenopodium subglabrum |
Chenopodium chenopodioides |
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Phenology | Fruiting mid summer–fall. | Fruiting summer–fall. |
Habitat | Sandy areas, particularly sand bars in rivers and in sandy blowouts near river banks | Borders of lakes and ponds, lake bottoms, in fields |
Elevation | 400-1400 m (1300-4600 ft) | 100-2400 m (300-7900 ft) |
Distribution |
CO; IA; MT; ND; NE; NV; SD; UT; WA; WY; AB; MB; SK
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CA; CO; NV; OR; UT; WA; WY; South America
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Discussion | 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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Source | FNA vol. 4, p. 289. | FNA vol. 4, p. 282. |
Parent taxa | Chenopodiaceae > Chenopodium > subg. Chenopodium > sect. Chenopodium > subsect. Leptophylla | Chenopodiaceae > Chenopodium > subg. Blitum > sect. Pseudoblitum |
Sibling taxa | ||
Synonyms | C. leptophyllum var. subglabrum | Blitum chenopodioides, C. botryodes, C. chenopodioides var. degenianum, C. crassifolium |
Name authority | (S. Watson) A. Nelson: Bot. Gaz. 34: 362. (1902) | (Linnaeus) Aellen: in C. Osten et al., Ostenia, 98. (1933) |
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