The gypsum flora of Nova Scotia refers to a small group of plants that are restricted to naturally-occurring outcrops of gypsum. Nova Scotia is unique in northeastern North America for the extent of sites having gypsum bedrock at or near the soil surface. The distinctive set of plants associated with these gypsum exposures includes Packera paupercula (Balsam groundsel), Carex eburnea (Ebony sedge), Erigeron hyssopifolius (Hyssop-leaved fleabane), Cypripedium parviflorum (Small yellow lady’s-slipper). Karst landscapes have also formed. Some of these species appear to be associated with sunny clearings created by natural erosion from gypsum cliffs, which provides a distinctive sunny and calcareous habitat within landscapes that are otherwise forested.
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