To see spores clearly, this peridium must be cut with a scalpel before sporocarps are mounted on a slide. In some older spores, the apex also will thicken more than the sides of elliptical or clavate spores.
Reports indicate germ tubes produce extramatrical vesicle-like structures.
No sporocarps are evident where intensive arbuscule development is observed. They are associated with roots containing mostly loose intraradical hyphae and some vesicles. Interestingly, the spores appear to form concurrently from the central plexus, after which the spore walls differentiate and thicken together as well. The data collected thus far on this culture do not change our view that this species deserves placement in a genus separate from Glomus . Sporocarp formation is more complex than that in Glomus but the various differences among species form an unbroken continuum.