tuberlessadj.

/ˈtjuːbəlɪs/Etymology: < tuber n.2 + -less suffix.
the world > plants > part of plant > root > plant defined by roots > [adjective] > having or not having tubers
1851 Dec. 217 Finding..that the plant [Tropæolum Deckerianum] was tuberless, I came to the conclusion that it must be an annual.
This entry has not yet been fully updated (first published 1915; most recently modified version published online March 2018).