Tuberous

['tjuːb(ə)rəs] or ['tʊbərəs]

(adj.) of or relating to or resembling a tuber; 'a tuberous root' .

Edited by Enrico--From WordNet

(a.) Covered with knobby or wartlike prominences; knobbed.

(a.) Consisting of, or bearing, tubers; resembling a tuber.

Edited by Dorothy