Cyperus prolixus, Cyperus pseudothyrsiflorus, Cyperus refractus, Cyperus retroflexus, Cyperus retrofractus, Cyperus retrorsus, Cyperus rotundus, Cyperus schweinitzii
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hypochondriacus, Amaranthus obcordatus, Amaranthus powellii, Amaranthus retroflexus, Amaranthus spinosus, Amaranthus tamaulipensis, Amaranthus torreyi, Amaranthus
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variability of A. retroflexus. Putative hybrids of A. retroflexus were described from Europe as A. ×ozanonii Thellung (A. hybridus × A. retroflexus) and A. ×soproniensis
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Amaranthaceae Amaranthaceae Amaranthaceae Amaranthus caudatus Amaranthus retroflexus Amaranthus hybridus Amaranthus powellii Amaranthus spinosus Yevonn Wilson-Ramsey
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WeedyIllustrated Synonyms: Amaranthus bracteosus Uline & W. L. Bray Amaranthus retroflexus var. powellii (S. Watson) B. Boivin Treatment appears in FNA Volume 4
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tepals in A. dubius, almost equal to tepals in some rare forms of A. retroflexus; seeds brown to black; plants wild, often weedy > 46 44 Inflorescences
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familyCyperaceae genusCyperus subgenusCyperus subg. Cyperus speciesCyperus retroflexus Buckley Proc. Acad. Nat. Sci. Philadelphia. 14: 9. 1862. Gordon C. Tucker*
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1900. Jeremy J. Bruhl, S. Galen Smith Illustrated Basionym: Scirpus retroflexus Poiret in J. Lamarck et al., Encycl. 6: 753. 1804 Synonyms: Baeothryon
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misapplied to other species, notably A. powellii, and specimens of A. retroflexus, A. powellii, and A. hybridus are frequently interchangeably misidentified
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Sundberg† Common names: Rigid whitetop aster Endemic Basionym: Aster retroflexus Lindley ex de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
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Amaranthaceae Amaranthaceae Amaranthaceae Amaranthus caudatus Amaranthus retroflexus Amaranthus hybridus Amaranthus powellii Amaranthus spinosus Yevonn Wilson-Ramsey
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, N.Mex., Tex. Amaranthus wrightii seems to be closely related to A. retroflexus. In some herbaria the specimens of A. acanthochiton J. D. Sauer (previously
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Generated Map Legacy Map Tex., Mexico. Included previously in Cyperus retroflexus (or its synonym C. uniflorus), C. floribundus has a much narrower geographic
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glabrous midrib and mucro 0.1–0.3(–0.5) mm; anthers (0.3–)0.4–0.6 mm Cyperus retroflexus 54 Longest spikelets 9–21 mm; distal floral scales with scabrid midrib
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