In article , Iris Cohen
writes
the identity of the mycorrhizal symbiont of an orchid species is evidence
for its taxonomic position within
Orchidaceae.

You ought to fix your attributions.

Funny that Robert Dressler, the doyen of orchid taxonomy, has never even
mentioned it. What scientific studies or evidence do you have to back this up?
Can you give a specific example?

If you were to go back and read the material that you snipped in your
reply, so you'd see that I didn't claim that it had been used (I
admitted ignorance on that point); only that could potentially be used,
and I gave reasoning (which you also snipped) as to why that might be
the case.

--
Stewart Robert Hinsley