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

Cyanobacteria within the coralloid roots of Cycas are chemoheterotrophic and specifically adapted to life in symbiosis. Only a few species of cyanobacteria form associations with Cycas. Pinus is a gymnosperm. Equisetum belongs to vascular plants and to horse tail family. Psilotum belongs to division-Pteridophyta and is a fern like plant.