''Carex argyrantha'', the hay sedge, is a species of flowering plant in the family

Cyperaceae The Cyperaceae are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large, with some 5,500 known species described in about 90 genera, the largest being the "true sedges" genus ''Carex'' w ...

. It is native to eastern Canada and the east-central and northeastern United States, and has gone extinct in Delaware. It typically grows in rocky woodlands and on sandstone ledges and has potential for use on

green roofs A green roof or living roof is a roof of a building that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane. It may also include additional layers such as a root barrier and drainage ...

References

argyrantha Flora of Ontario Flora of Quebec Flora of New Brunswick Flora of Nova Scotia Flora of the Northeastern United States Flora of Tennessee Flora of North Carolina Flora of Virginia Plants described in 1862 {{Carex-stub