''Carex subspathacea'', called Hoppner's sedge, is a species of flowering plant in the genus '' Carex'', native to coastal salt marshes of the Arctic and northwest Pacific Oceans; Alaska, Canada, Greenland, Iceland, Norway, northern and far eastern Russia, Korea, and Japan. It is grazed by snow geese ('' Anser caerulescens'').

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subspathacea Plants described in 1816 {{Carex-stub