The Collaborative International Dictionary of English v.0.48:

Cockscomb \Cocks"comb`\ (k[o^]ks"k[=o]m`), n. [1st cock, n. +
   comb crest.]
   1. See Coxcomb.
      [1913 Webster]

   2. (Bot.) A plant (Celosia cristata), of many varieties,
      cultivated for its broad, fantastic spikes of brilliant
      flowers; -- sometimes called garden cockscomb. Also the
      Pedicularis, or lousewort, the Rhinanthus
      Crista-galli, and the Onobrychis Crista-galli.
      [1913 Webster]