How I understand it there is according to current scientific research indeed only one mycorrhizae that creates an interesting
symbiotic relationship with Cannabis: Glomus Intraradices (aka Rhizophagus Intraradices).
There are several other mycorrhizae which create a symbiotic relationship, but current research shows that these aren't all interesting and might even be detrimental.
Also don't confuse endophytes with endomycorrhizae.
Here is a link to an interesting article
And a link to the scientific research that is mentionned in the above article about Glomus Mosseae. Which shows that G. Mosseae might be detrimental for Cannabis.
This doesn't proof that only Glomus Intraradices (aka Rhizophagus Intraradices) is the only interesting mycorrhizae. Maybe future research shows that more mycorrhizae form an interesting symbiotic relationship with Cannabis. And maybe that future research shows that G. Mosseae might be usefull for the uptake of micronutrients.
Edit: Glomus Intraradices is indeed the old name.
Recent molecular analysis of Ribosomal DNA suggested that Glomus Intraradices is not in fact in the genus Glomus at all, and should be renamed Rhizophagus Intraradices.