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- Cyperus pseudothyrsiflorus, Cyperus refractus, Cyperus retroflexus, Cyperus retrofractus, Cyperus retrorsus, Cyperus rotundus, Cyperus schweinitzii, Cyperus setigerus2 KB (405 words) - 20:39, 5 November 2020
- Common names: Bristly flatsedge IllustratedEndemic Synonyms: Cyperus retrofractus var. hystricinus (Fernald) Kükenthal Treatment appears in FNA Volume4 KB (356 words) - 20:39, 5 November 2020
- IllustratedEndemic Basionym: Scirpus retrofractus Linnaeus Sp. Pl. 1: 50. 1753 Synonyms: Cyperus dipsaciformis Fernald Cyperus retrofractus var. dipsaciformis (Fernald)4 KB (358 words) - 20:39, 5 November 2020
- length; longest ray shorter than bracts; culm sharply angled Cyperus retrofractus 94 Spikes tight, burlike, turbinate; terminal scale spinose; spikelets39 KB (517 words) - 14:42, 16 November 2022