Difference between revisions of "Chenopodium berlandieri"
Chenop. Monogr. Enum. , 23. 1840.
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Latest revision as of 17:03, 6 November 2020
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
Alta., B.C., Man., N.S., N.W.T., Ont., P.E.I., Que., Sask., Yukon, Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., D.C., Del., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Mass., Md., Mich., Minn., Miss., Mo., N.C., N.Dak., N.H., N.J., N.Mex., N.Y., Nebr., Nev., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Va., Vt., W.Va., Wash., Wis., Wyo., 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 |