The Collaborative International Dictionary of English v.0.48:

Succory \Suc"co*ry\, n. [Corrupted from chicory.] (Bot.)
   A plant of the genus Cichorium. See Chicory.
   [1913 Webster]

WordNet (r) 3.0 (2006):

succory
    n 1: perennial Old World herb having rayed flower heads with
         blue florets cultivated for its root and its heads of crisp
         edible leaves used in salads [syn: chicory, succory,
         chicory plant, Cichorium intybus]