With high enough plant lore and perhaps with scouting and/or modified
skill plant lore, you could find what you're looking for the same
way the outworld mobs are seen now. You could do like:

use plant lore at search mushroom

And in your map it would show as '§' (for example), like this:
-------------------

F Loc: A scenic location in northern Batrealm
FFFFFFF Exits: nw, n, ne, w, e, sw, s, se, path
FFFhhh§FF
FFhh@hhFF You have entered a valley in between two hills. In the
§FFhh§FFF north you can see a narrow path, which climbs up the
FFFFFFF slope of a hill. Above you is a slowly moving, clear
F night sky. A light wind stirs the air. A waning gibbous
moon hangs in the sky.

--------------------

~/A