swanii Fernald Carex swanii, known as Swan's sedge or downy green sedge, is a species of flowering plant in the family Cyperaceae.

[1][2] It is native to eastern North America.

[1] It was originally described as Carex virescens var.

swanii Fernald in 1906,[3] then elevated to species in 1910.

[4] The species was named for Charles Walter Swan (1838-1921), a naval surgeon and early member of the New England Botanical Club.