Cyperus refractus, Cyperus retroflexus, Cyperus retrofractus, Cyperus retrorsus, Cyperus rotundus, Cyperus schweinitzii, Cyperus setigerus, Cyperus spectabilis
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Penstemon discolor, Penstemon linarioides, Penstemon pinifolius, Penstemon retrorsus, Penstemon teucrioides, Penstemon thompsoniae, Penstemon xylus (Rydberg)
7 KB (418 words) - 20:31, 5 November 2020
globulosus var. robustus (Boeckeler) Shinners Cyperus plankii Chapman Cyperus retrorsus var. robustus Kükenthal Mariscus bracheilema C. B. Clarke Mariscus brittonii
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Gary I. Baird Common names: Spearleaf agoseris Basionym: Macrorhynchus retrorsus Bentham Pl. Hartw., 320. 1849 Synonyms: Macrorhynchus angustifolius Kellogg
4 KB (358 words) - 20:52, 5 November 2020
occasionally be hard to distinguish from C. croceus and C. retrorsus. Compared to C. retrorsus, C. echinatus has larger spikelets and longer floral scales
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subgenusPenstemon subg. Penstemon sectionPenstemon sect. Caespitosi speciesPenstemon retrorsus Payson ex Pennell Contr. U.S. Natl. Herb. 20: 373. 1920. Craig C. Freeman
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familyCyperaceae genusCyperus subgenusCyperus subg. Cyperus speciesCyperus retrorsus Chapman Bot. Gaz. 3: 17. 1878. Gordon C. Tucker*, Brian G. Marcks*, J.
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appressed, mostly greater than 2.5 mm (rarely as short as 1.8 mm in C. retrorsus); achenes abruptly constricted, not fusiform; rachilla wing persistent
39 KB (517 words) - 15:42, 16 November 2022
Britton Cyperus pollardii Britton Cyperus retrorsus var. curtisii (C. B. Clarke) Kükenthal Cyperus retrorsus var. deeringianus (Britton & Small) Fernald
4 KB (292 words) - 21:39, 5 November 2020