Is there a name for things that grow like potatoes? I'm sure this is a horribly ignorant question, but as someone who's pretty ignorant about plant lifecycles my brain is organised around the seed -> plant -> flower -> fruit(?) -> seed lifecycle familiar to anyone growing a chilli plant or herbs like coriander. I have accidentally grown potatoes in my compost pile and I still struggle to understand how we go from "one potato" to "shitloads of potatoes". I guess because it happens underground it's so mysterious to me.