| Lobelia cardinalis | 
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| Scientific classification | 
| Kingdom: | Plantae | 
 
| Clade: | Tracheophytes | 
 
| Clade: | Angiosperms | 
 
| Clade: | Eudicots | 
 
| Clade: | Asterids | 
 
| Order: | Asterales | 
 
| Family: | Campanulaceae | 
 
| Genus: | Lobelia | 
| Species: | L. cardinalis | 
| Binomial name | 
| Lobelia cardinalis 
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| Synonyms | 
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Dortmanna cardinalis (L.) KuntzeDortmanna cordigera (Cav.) KuntzeDortmanna engelmanniana KuntzeDortmanna fulgens (Humb. & Bonpl. ex Willd.) KuntzeDortmanna graminea (Lam.) KuntzeDortmanna longifolia (C.Presl) KuntzeDortmanna phyllostachya (Engelm.) KuntzeDortmanna splendens (Humb. & Bonpl. ex Willd.) KuntzeLobelia cardinalis  f. alba (J.McNab) H.St.JohnLobelia cardinalis var. alba J.McNabLobelia cardinalis var. angustifolia VatkeLobelia cardinalis var. candida Alph.WoodLobelia cardinalis  f. cordigera (Cav.) BowdenLobelia cardinalis var. glandulosa N.ColemanLobelia cardinalis var. graminea (Lam.) McVaughLobelia cardinalis subsp. graminea (Lam.) McVaughLobelia cardinalis var. hispidula E.Wimm.Lobelia cardinalis  f. hispidula (E.Wimm.) BowdenLobelia cardinalis var. integerrima Alph.WoodLobelia cardinalis var. meridionalis BowdenLobelia cardinalis var. multiflora (Paxton) McVaughLobelia cardinalis var. phyllostachya (Engelm.) McVaughLobelia cardinalis var. propinqua (Paxton) BowdenLobelia cardinalis var. pseudosplendens McVaughLobelia cardinalis  f. rosea H.St.JohnLobelia cardinalis var. texensis (Raf.) Rothr.Lobelia coccinea (Moench) StokesLobelia cordigera Cav.Lobelia cordigera var. fatalis E.Wimm.Lobelia cordigera var. marryattiae (Paxton) E.Wimm.Lobelia cordigera var. multiflora (Paxton) E.Wimm.Lobelia fulgens Humb. & Bonpl. ex Willd.Lobelia fulgens  f. atrosanguinea (Hook.) VossLobelia fulgens var. multiflora PaxtonLobelia fulgens var. propinqua PaxtonLobelia fulgens var. pyramidalis PaxtonLobelia graminea Lam.Lobelia graminea var. intermedia E.Wimm.Lobelia graminea  f. kerneri (L.Nagy) E.Wimm.Lobelia graminea var. phyllostachya (Engelm.) E.Wimm.Lobelia ignea PaxtonLobelia kerneri L.NagyLobelia longifolia (C.Presl) A.DC.Lobelia marryattiae PaxtonLobelia mucronata Engelm.Lobelia phyllostachya Engelm.Lobelia porphyrantha Decne. ex GroenlandLobelia princeps Otto & A.Dietr.Lobelia propinqua J.W.LoudonLobelia punicea Otto & A.Dietr.Lobelia punicea var. kerneri (L.Nagy) E.Wimm.Lobelia ramosa Burb.Lobelia schiedeana Heynh.Lobelia splendens Humb. & Bonpl. ex Willd.Lobelia splendens var. atrosanguinea Hook.Lobelia splendens var. fulgens (Humb. & Bonpl. ex Willd.) S.WatsonLobelia splendens var. ignea Hook.Lobelia texensis Raf.Rapuntium cardinale (L.) Mill.Rapuntium coccineum MoenchRapuntium cordigerum (Cav.) C.PreslRapuntium fulgens (Humb. & Bonpl. ex Willd.) C.PreslRapuntium gramineum (Lam.) C.PreslRapuntium longifolium C.PreslRapuntium splendens (Humb. & Bonpl. ex Willd.) C.PreslTupa ignescens Payer
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Lobelia cardinalis, the cardinal flower (syn. L. fulgens), is a species of flowering plant in the bellflower family   Campanulaceae native to the Americas, from southeastern Canada south through the eastern and southwestern United States, Mexico and Central America to northern Colombia.