The Collaborative International Dictionary of English v.0.48:
Arundinaceous \A*run`di*na"ceous\, a. [L. arundinaceus, fr. arundo reed.] Of or pertaining to a reed; resembling the reed or cane. [1913 Webster]WordNet (r) 3.0 (2006):
arundinaceous adj 1: of or relating to or resembling reedlike plants of the genus Arundinaria