This is an older species and it has broken up into six disjunct populations, five of which have been named a subspecies and three of these were also named as species.
Photographed below is the last plant of Sarracenia rubra subsp. rubra in Ash, North Carolina as 2004. This location used to host hundreds of plants, until the North Carolina DOT started using herbicide vegetation control measures instead of the more ecological sound method of mowing. We have probably degraded or lost hundreds of roadside pitchers plant sites where the plants were otherwise healthy to such herbicide treatments. This method of vegetation control is important, but when used on sensitive areas like wetlands the results can be catastrophic to populations of certain species.