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3a. Amaranthus Linnaeus subg. Acnida (Linnaeus) Aellen ex K. R. Robertson, J. Arnold Arbor. 62: 283. 1981.
Acnida Linnaeus, Sp. Pl. 2: 1027. 1753; Gen. Pl. ed. 5, 452. 1754
Plants dioecious. Stems erect to ascending, not fleshy. Inflorescences mostly terminal, well-developed spikes or spicate panicles. Pistillate flowers: tepals absent or 1-5. Utricles indehiscent or dehiscence circumscissile.
Species 9 (9 in the flora): North America, Mexico, Central America, n South America, introduced elsewhere.
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