芋いも頭がしら

noun

tubercle

Botanical term for a small tuber or tuber-like swelling, especially on the stem or root of a plant. Not a common everyday word.

• この植しょく物ぶつの茎くきには小ちいさな芋いも頭がしらがいくつも付ついている。

  Several small tubercles are attached to the stem of this plant.