Originally posted by Lenny Rat:

What are they useful for?

They increase the comfort level.
Max is 18 with maypole.

I think that equates to a 25 min rested bonus

I have only found two in 12 or so seeds. Only put a base around one of them. Nice we can craft them now but it's only temporary so I need to get a bunch in the different worlds I have before they disable it again.

https://steamcommunity.com/sharedfiles/filedetails/?id=2525320092