I remembered someone posting this in 2014, and I actually found it:
[/uploads/stonehearth/original/2X/3/3c8785344c4fbb898f63e9dd8982769a321646d3.jpg]
(/uploads/stonehearth/original/2X/3/3c8785344c4fbb898f63e9dd8982769a321646d3.jpg)
source:
http://discourse.stonehearth.net/t/dwarves-need-wood-what-about-roots/1171/52?u=crazycandy