I've been playing Reus for one week now and had a great moment doing it. I don't know how you play it, but lately, i've been annoyed to spend my time alt+tabing to read wiki.reusgame.com or to look at the annotated diagrams HaRLeKin uploaded there. Are you doing the same ? Did you already learn every possible combination of natural sources ? I was wondering if there was some kind of printable cheat sheet to help me out.
So, since i didn't found one yet, I started to write mine, based on the available information on the wiki and the previous work from HaRLeKin.

http://ragondin-earth.org/divers/forest.png
I've tried to
- use bright colors so it can be easily printed
- use concise and precise language to describe symbioses, i'm still not happy about it
- give some comprehension of the upgrades tree, grouping sources by the number of upgrade slots they have