Rhizophagus iranicus var. tenuihypharum
Glomus iranicum var. tenuihypharum is an arbuscular mycorrhizal fungus (AMF) that helps improve the physiochemical conditions of the soil and stimulates growth and productivity of the majority of plants.
Source: Wikipedia — Rhizophagus iranicus var. tenuihypharum (CC BY-SA 4.0)