The Collaborative International Dictionary of English v.0.48:

Lycopodiaceous \Ly`co*po`di*a"ceous\, a. (Bot.)
   Belonging, or relating, to the Lycopodiace[ae], an order of
   cryptogamous plants (called also club mosses) with
   branching stems, and small, crowded, one-nerved, and usually
   pointed leaves.
   [1913 Webster]