Source : Webster's Revised Unabridged Dictionary (1913)

Arundinaceous \A*run`di*na"ceous\, a. [L. arundinaceus, fr.
   arundo reed.]
   Of or pertaining to a reed; resembling the reed or cane.

Source : WordNet®

arundinaceous
     adj : of or relating to or resembling reed-like plants of the
           genus Arundinaria