Question

why are potatoes called tubers?​

Answer 1

Potatoes are stem tubers. Enlarged stolons thicken to develop into storage organs. The tuber has all the parts of a normal stem, including nodes and internodes. The tuber is produced in one growing season and used to perennate the plant and as a means of propagation

Answer 2

Potatoes are stem tubers. Enlarged stolons thicken to develop into storage organs. The tuber has all the parts of a normal stem, including nodes and internodes. ... The tuber is produced in one growing season and used to perennate the plant and as a means of propagation.