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1 Perianth segments 3 or 5; stamens 2-4. | |
1 Seeds arranged vertically or both horizontally and vertically in the fruit; leaf blades glabrous or occasionally sparsely farinose. | |
2 Perianth segments 3; plants annual. | |
4 Leaves glabrous and green on the lower surface. | |
6 Flowers individually disposed in panicles; leaf blades glabrous; [Chenopodiastrum, sect. Grossefoveata] | |
7 Primary leaves linear, linear-lanceolate, at least 2-3× as long as wide, usually untoothed and unlobed (but often with 2 basal lobes in C. foggii); [subsection Leptophylla]. | |
8 Leaves 1-veined, linear. | |
11 Perianth enclosing the fruit at maturity; plants erect to spreading. | |
7 Primary leaves ovate, rhombic, triangular, or lanceolate, usually with basal lobes and often also with additional teeth on the margins. | |
15 Style bases with yellow area; seeds 1.2.1.5 mm in diameter | |
15 Style bases without yellow area; seeds 1.3-2.0 mm in diameter. | |
17 Leaves 3-lobed; inflorescences with or without bracts. | |
13 Seeds smooth or areolate. | |
20 Leaves triangular. | |
22 Plants profusely branching from base; seeds 0.9-1.1(-1.2) mm in diam. | |
24 Leaf blades without teeth, except for the often present basal lobes or teeth. | |
25 Leaves not aromatic; flowers in each glomerule in markedly different stages of development; [subsection Standleyana] | |
25 Leaves strongly malodorous; flowers in each glomerule in similar stages of development; [subsection Chenopodium] | |
26 Leaves ovate, rhombic, or lanceolate, >1× as long as wide; lateral leaf lobes smaller than the terminal lobe (or absent). | |
27 Leaf margins more or less parallel below the obtuse apex; leaves lanceolate to narrowly elliptic; inflorescence generally moniliform, not profusely branched; seeds oval in outline; pericarp strongly adherent | |
29 Plant sparsely branched, with an erect habit; inflorescences in paniculate spikes; lower leaves lobed or toothed; upper leaves triangular and toothed | |
29 Plant densely branched from base; inflorescences in paniculate arching branches; lower leaves with a few lobes or teeth; upper leaves lanceolate and entire |