I chose to focus on just one feature present in the four bins. (Thank you, https://northernwoodlands.org/articles/article/needles-leaves). And that was plenty. It’s a bit of a logic puzzle. It took me a long time to think my way through labelling the choices A/A1—F in the second version I wrote. Still not sure if it flows; I think it does.
I have used dichotomous keys to identify mushrooms. They are definitely easier to use than create.
ps. 21 Types of Hairiness or Fuzziness, a fun list at https://www2.palomar.edu/users/warmstrong/termlf2.htm helped me with the word “lanate”.