Naming
Four subspecies have been named:⤷ ''D. carolinianum'' var. ''calciphilum'' - Native to cedar glades of the Southeastern United States
⤷ ''D. carolinianum'' var. ''carolinianum'' - Widespread in central and eastern North America
⤷ ''D. carolinianum'' var. ''vimineum'' - Native to coastal areas of the United States and Mexico
⤷ ''D. carolinianum'' var. ''virescens'' - Native to the Central United States
References:
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