What is stem tuber ?
Kindly refer to the similar link given below:
https://www.meritnation.com/ask-answer/question/what-is-the-difference-between-root-tuber-and-stem-tuber/how-do-organisms-reproduce/6906574
https://www.meritnation.com/ask-answer/question/what-is-the-difference-between-root-tuber-and-stem-tuber/how-do-organisms-reproduce/6906574