The Collaborative International Dictionary of English v.0.48:

Lignose \Lig*nose"\ (l[i^]g*n[=o]s"), Lignous \Lig"nous\
   (l[i^]g"n[u^]s), a. [L. lignosus, fr. lignum wood: cf. F.
   ligneux. Cf. Ligneous.]
   Ligneous. [R.] --Evelyn.
   [1913 Webster]