oyster plant, Also called: vegetable oyster a Mediterranean plant, Tragopogon porrifolius, having grasslike leaves, purple flower heads, and a long white edible taproot: family Asteraceae (composites)
2.
the root of this plant, which tastes of oysters and is eaten as a vegetable
[C17: from French salsifis, from Italian sassefrica, from Late Latin saxifrica, from Latin saxum rock + fricāre to rub]
biennial plant, 1675, from Fr. salsifis, earlier sercifi, sassify (16c.), probably from It. erba salsifica, from O.It. salsifica, of uncertain origin, perhaps from L. sal "salt" + fricare "to rub."