Besides paddy fields, cyanobacteria are also found inside vegetative part of

In Cycas, small specialised roots, called coralloid roots, are associated with N₂- fixing cyanobacteria.

(1) Equisetum, commonly known as horsetail or scouring rush, does not typically form symbiotic associations
with other organisms.

(2) Psilotum is known to form symbiotic associations with mycorrhizal fungi or other organisms.

(3) Pinus, commonly known as pine trees, forms a well-known symbiotic association with mycorrhizal fungi.