Difference between revisions of "Chenopodium berlandieri"
Chenop. Monogr. Enum. , 23. 1840.
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|genus=Chenopodium | |genus=Chenopodium | ||
|subgenus=Chenopodium subg. Chenopodium | |subgenus=Chenopodium subg. Chenopodium | ||
Revision as of 17:29, 18 September 2019
Stems erect to ascending, much-branched to simple, 1–10.5 dm, farinose. Leaves nonaromatic; petiole 0.2–9 cm; blade narrowly to broadly lanceolate, rhombic, ovate, or triangular, 1.2–12(–15) × 0.5–7.5(–9) cm, base cuneate to truncate, margins serrate, irregularly dentate, or entire, often with 2 basal lobes, apex acute to acuminate, farinose. Inflorescences glomerules in compound spikes, 5–17 cm; glomerules irregularly rounded, 4–7 mm diam.; bracts absent. Flowers: perianth segments 5, distinct nearly to base; lobes ovate to deltate, 0.7–1.5 × 0.7–1.3 mm, apex obtuse, farinose, often prominently keeled, covering fruit at maturity or not; stamens 5; stigmas 2, 0.3–0.5 mm. Achenes or utricles depressed-ovoid; pericarp adherent or nonadherent near stylar base, alveolate-rugose. Seeds round, 1–2 mm diam., margins rounded; seed coat brown to black, honeycomb pitted. 2n = 36.
Distribution
North America, introduced widely.
Discussion
Varieties 6 (6 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Seeds 1.2-2 mm diam | > 2 |
| 1 | Seeds 1-1.3 mm diam | > 4 |
| 2 | Style bases with yellow area; seeds 1.2-1.5 mm diam | Chenopodium berlandieri var. zschackei |
| 2 | Style bases without yellow area; seeds 1.3-2 mm diam | > 3 |
| 3 | Inflorescences large and drooping; seeds 1.7-2 mm diam | Chenopodium berlandieri var. bushianum |
| 3 | Inflorescences small and erect; seeds 1.3- 1.9 mm diam | Chenopodium berlandieri var. macrocalyci |
| 4 | Leaves not 3-lobed; inflorescences becoming bractless | Chenopodium berlandieri var. boscianum |
| 4 | Leaves 3-lobed; inflorescences with or without bracts | > 5 |
| 5 | Inflorescences bractless | Chenopodium berlandieri var. berl |
| 5 | Inflorescences with leafy bracts | > 6 |
| 6 | Style bases without yellow area | Chenopodium berlandieri var. sinuatum |
| 6 | Style bases with yellow area | Chenopodium berlandieri var. zschackei |