(n) perennial south European herb having narrow entire leaves and solitary yellow flower heads and long black edible roots shaped like carrots, Syn. Scorzonera hispanica, viper's grass, scorzonera
(n) Mediterranean biennial herb with long-stemmed heads of purple ray flowers and milky sap and long edible root; naturalized throughout United States, Syn. vegetable oyster, oyster plant, Tragopogon porrifolius
(n) European perennial naturalized throughout United States having hollow stems with a few long narrow tapered leaves and each bearing a solitary pale yellow flower, Syn. Tragopogon dubius