Rhizophagus clarus (previously known as Glomus clarum[1]) is an arbuscular mycorrhizal fungus in the family Glomeraceae.

The species has been shown to improve nutrient absorption and growth in several agricultural crops but is not typically applied commercially.

[9] Rhizophagus clarus is a biotrophic mutualist fungus that exchanges soil nutrients with its host plant for photoassimilates.

[8] Effector molecules secreted by the fungus affect plant signaling and immune function to promote fungal colonization.

[10] Hyphal anastomosis is common in colonies of Rhizophagus clarus and allows for horizontal gene transfer and increased variation in genotypes.