Mosses are found in moist, shady places, moist rocks, and damp walls or on tree trunks as well as lichens grow on rock surfaces & named by Theophrastus are the first organisms to colonize bare rock.
Selaginella is a heterosporous pteridophye, meaning both male and female spores are produced by the plant.
Coralloid roots of Cycas have nitrogen-fixing cyanobacteria. Mycorrhiza (VAM) is seen in the roots of Pinus.
Main plant body in bryophytes is gametophyte because gametophyte is dominant over sporophyte as gametophyte is branched, haploid, long-lived and independent whereas sporophyte is diploid short-lived and dependent upon gametophyte. Main plant body in pteridophyte is sporophyte.
Unlike bryophytes and pteridophytes, the male and the female gametophytes of gymnosperms do not have an independent free-living existence. They remain within the sporangia retained on the sporophytes.