[1] As is the case for all species in this genus, the mycorrhizal structure of G. aggregatum proliferates in straight lines along the cortex, branching dichotomously at cell junctions as it penetrates deeper into the root and extending in two directions at once.

[3] Rosendahl wrote of his discovery of grouped (or clustered) sporangia on thick-walled, branched hyphae recovered from disturbed soils in Minnesota.

[4] Over the course of the next 40 years, various researchers were able to isolate similar fungal spores (typically in areas with sand based soils), but it wasn't until 1982 that G. aggregatum was first described.

N.C. Schenck and George S. Smith were the researchers who made this discovery (in Florida Citrus groves) and their description was very similar to that of R. butleri and other fungi in the Glomus fasciculatum complex, however, it was still thought to be a different species than R.

[5] Further research was conducted, and after comparing extensive amounts of fungal spores, a conclusion was reached that G. aggregatum and R. butleri are in-fact the same species of fungi.

It has also been suggested that selective inoculation of mycorrhiza into certain crops can increase water retention and help mitigate toxic factors in major food sources such as rice.