collard

from WordNet (r) 3.0 (2006)

collard
    n 1: variety of kale having smooth leaves

from The Collaborative International Dictionary of English v.0.48

collard \collard\ n.
   1. a variety of kale ({Brassica oleracea}) having smooth
      leaves; a type of colewort. It is grown in the southern U.
      S.
      [WordNet 1.5 +PJC]