minor var. minor f. viridescensS.McPherson & D.E.Schnell S. minor var. okefenokeensisD.E.Schnell Sarracenia oreophila S. oreophila var. oreophila(autonym) S. oreophila var. ornataS.McPherson & D.E.Schnell Sarracenia psittacina S. psittacina var. psittacina(autonym) S. psittacina var. psittacina f. viridescensS.McPherson & D.E.Schnell S. psittacina var. okefenokeensisS.McPherson & D.E.Schnell S. psittacina var. okefenokeensis f. luteoviridisS.McPherson & D.E.Schnell Sarracenia purpurea S. purpurea subsp. purpurea(autonym) S. purpurea subsp. purpurea f. heterophylla(Eaton) Fern. S. purpurea subsp. venosa(Raf.) Wherry S. purpurea subsp. venosa var. venosa(autonym) S. purpurea subsp. venosa var. venosa f. pallidifloraS.McPherson & D.E.Schnell S. purpurea subsp. venosa var. burkiiD.E.Schnell S. purpurea subsp. venosa var. burkii f. luteolaR.L.Hanrahan & J.Miller S. purpurea subsp. venosa var. montanaD.E.Schnell & R.O.Determann Sarracenia rubra S. rubra subsp. rubra(autonym) S. rubra subsp. alabamensis(Case & R.B.Case) S.McPherson & D.E.Schnell S. rubra subsp. gulfensisD.E.Schnell S. rubra subsp. gulfensis f. luteoviridisS.McPherson & D.E.Schnell S. rubra subsp. jonesii(Wherry) Wherry S. rubra subsp. jonesii f. viridescensS.McPherson & D.E.Schnell S. rubra subsp. wherryi(Case & R.B.Case) D.E.Schnell S. rubra "Incompletely diagnosed taxon from Georgia and South Carolina"(Undescribed, but see note below) Note: The entity McPherson and Schnell referred to as S. rubra "Incompletely diagnosed taxon from Georgia and South Carolina" has since been established as Sarracenia rubra subsp. viatorum B.Rice. Hybrids Sarracenia species hybridize and produce fertile offspring freely, making proper classification difficult. Sarracenia hybrids are able to hybridize further, giving the possibility of hundreds of different hybrids that have multiple species in varying amounts in their ancestry. Since many species ranges overlap, natural hybrids are relatively common. As a result, initial classification included many of these hybrids as separate species. A recent census of the number of hybrids and cultivars of Sarracenia species revealed about 100 unique hybrids and cultivars in cultivation. Many hybrids of Sarracenia are still commonly referred to by their obsolete species names, particularly in horticulture. These hybrids are all popularly cultivated by carnivorous plant enthusiasts, and there are consequently a huge number of hybrids and cultivars, most bred for showy pitchers. Some of the more common named hybrids include: Sarracenia × catesbaei = S. flava × S. purpurea Sarracenia × moorei = S. flava × S. leucophylla Sarracenia × popei = S. flava × S. rubra Sarracenia × harperi = S. flava × S. minor Sarracenia × alava = S. flava × S. alata Sarracenia × mitchelliana = S. purpurea × S. leucophylla Sarracenia × exornata = S. purpurea × S. alata Sarracenia × chelsonii =