I figured as much.
I started learning about mycorrhizal fungi a long time ago.
I forgot which group of orchids led me to find out more about them, but I do recall that the ones that really brought this subject matter to the forefront were the native Australian terrestrial orchids - in particular, orchids of the following genera:
- Caladenia
- Leptoceras
- Thelymitra
- Diuris
There were a few other genera of orchids that really got me to take a look at mycorrhizal relationships further, but these were the big ones - along with orchids in the genus Disa.
---------- Post added at 10:39 PM ---------- Previous post was at 10:39 PM ----------
Thank you.
Good night Tom.

---------- Post added at 10:43 PM ---------- Previous post was at 10:39 PM ----------
Forgot...
Bee Orchids grow in calcium type sands.
Donkey Orchids grow in acidic sandy loams comprised of decomposed granitic materials with clay minerals in that mix.